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1 schoenebeck 151 <?xml version="1.0" encoding="UTF-8"?>
2    
3     <!DOCTYPE rfc SYSTEM "rfc2629.dtd" [
4     <!ENTITY rfc2119 PUBLIC ''
5     'http://xml.resource.org/public/rfc/bibxml/reference.RFC.2119.xml'>
6     ]>
7    
8     <?xml-stylesheet type='text/xsl' href='rfc2629.xslt' ?>
9    
10     <?rfc toc="yes" ?>
11     <?rfc symrefs="yes" ?>
12     <?rfc sortrefs="yes"?>
13     <?rfc iprnotified="no" ?>
14    
15 schoenebeck 973 <!-- FIXME: next attribute should actually be "yes", temporarily disbled due
16     to an annoying "missing Normative/Informative References" error message -->
17     <?rfc strict="no" ?>
18    
19     <rfc category="std" ipr="full3978" docName="LSCP 1.2">
20 schoenebeck 151 <front>
21     <title>LinuxSampler Control Protocol</title>
22     <author initials='C.S.' surname="Schoenebeck" fullname='C.
23     Schoenebeck'>
24     <organization>
25     Interessengemeinschaft Software Engineering e. V.
26     </organization>
27     <address>
28     <postal>
29     <street>Max-Planck-Str. 39</street>
30     <!-- <code>74081</code> -->
31     <city>74081 Heilbronn</city>
32     <country>Germany</country>
33     </postal>
34     <email>schoenebeck at software minus engineering dot org</email>
35     </address>
36     </author>
37 schoenebeck 1027 <date month="January" year="2007"/>
38 schoenebeck 151 <workgroup>LinuxSampler Developers</workgroup>
39     <keyword>LSCP</keyword>
40     <abstract>
41     <t>The LinuxSampler Control Protocol (LSCP) is an
42     application-level protocol primarily intended for local and
43 schoenebeck 571 remote controlling the LinuxSampler backend application, which is a
44     sophisticated server-like console application essentially playing
45     back audio samples and manipulating the samples in real time to
46     certain extent.</t>
47 schoenebeck 151 </abstract>
48     </front>
49    
50     <middle>
51     <section title="Requirements notation">
52     <t>The key words "MUST", "MUST NOT", "REQUIRED", "SHALL",
53     "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY",
54     and "OPTIONAL" in this document are to be interpreted as
55     described in <xref target="RFC2119"/>.</t>
56    
57     <t>This protocol is always case-sensitive if not explicitly
58     claimed the opposite.</t>
59    
60     <t>In examples, "C:" and "S:" indicate lines sent by the client
61     (front-end) and server (LinuxSampler) respectively. Lines in
62     examples must be interpreted as every line being CRLF
63     terminated (carriage return character followed by line feed
64     character as defined in the ASCII standard), thus the following
65     example:</t>
66    
67     <t>
68     <list>
69     <t>C: "some line"</t>
70     <t>&nbsp;&nbsp;&nbsp;"another line"</t>
71     </list>
72     </t>
73    
74     <t>must actually be interpreted as client sending the following
75     message:</t>
76    
77     <t>
78     <list>
79     <t>"some line&lt;CR&gt;&lt;LF&gt;another
80     line&lt;CR&gt;&lt;LF&gt;"</t>
81     </list>
82     </t>
83    
84     <t>where &lt;CR&gt; symbolizes the carriage return character and
85     &lt;LF&gt; the line feed character as defined in the ASCII
86     standard.</t>
87    
88     <t>Due to technical reasons, messages can arbitrary be
89     fragmented, means the following example:</t>
90    
91     <t>
92     <list>
93     <t>S: "abcd"</t>
94     </list>
95     </t>
96    
97     <t>could also happen to be sent in three messages like in the
98     following sequence scenario:</t>
99    
100     <t>
101     <list style="symbols">
102     <t>server sending message "a"</t>
103     <t>followed by a delay (pause) with
104     arbitrary duration</t>
105     <t>followed by server sending message
106     "bcd&lt;CR&gt;"</t>
107     <t>again followed by a delay (pause) with arbitrary
108     duration</t>
109     <t>followed by server sending the message
110     "&lt;LF&gt;"</t>
111     </list>
112     </t>
113    
114     <t>where again &lt;CR&gt; and &lt;LF&gt; symbolize the carriage
115     return and line feed characters respectively.</t>
116     </section>
117    
118 schoenebeck 571 <section title="Versioning of this specification" anchor="LSCP versioning">
119     <t>LSCP will certainly be extended and enhanced by-and-by. Each official
120     release of the LSCP specification will be tagged with a unique version
121     tuple. The version tuple consists at least of a major and minor version
122     number like:
123     </t>
124     <t>
125     <list>
126     <t>"1.2"</t>
127     </list>
128     </t>
129     <t>
130     In this example the major version number would be "1" and the minor
131     version number would be "2". Note that the version tuple might also
132     have more than two elements. The major version number defines a
133     group of backward compatible versions. That means a frontend is
134     compatible to the connected sampler if and only if the LSCP versions
135     to which each of the two parties complies to, match both of the
136 schoenebeck 573 following rules:
137 schoenebeck 571 </t>
138     <t>Compatibility:</t>
139     <t>
140     <list style="numbers">
141     <t>The frontend's LSCP major version and the sampler's LSCP
142     major version are exactly equal.</t>
143     <t>The frontend's LSCP minor version is less or equal than
144     the sampler's LSCP minor version.</t>
145     </list>
146     </t>
147     <t>
148     Compatibility can only be claimed if both rules are true.
149     The frontend can use the
150     <xref target="GET SERVER INFO">"GET SERVER INFO"</xref> command to
151     get the version of the LSCP specification the sampler complies with.
152     </t>
153     </section>
154    
155 schoenebeck 151 <section title="Introduction">
156     <t>LinuxSampler is a so called software sampler application
157     capable to playback audio samples from a computer's Random
158     Access Memory (RAM) as well as directly streaming it from disk.
159     LinuxSampler is designed to be modular. It provides several so
160     called "sampler engines" where each engine is specialized for a
161     certain purpose. LinuxSampler has virtual channels which will be
162     referred in this document as "sampler channels". The channels
163     are in such way virtual as they can be connected to an
164     arbitrary MIDI input method and arbitrary MIDI channel (e.g.
165 schoenebeck 222 sampler channel 17 could be connected to an ALSA sequencer
166 schoenebeck 151 device 64:0 and listening to MIDI channel 1 there). Each sampler
167 schoenebeck 571 channel will be associated with an instance of one of the available
168 schoenebeck 151 sampler engines (e.g. GigEngine, DLSEngine). The audio output of
169     each sampler channel can be routed to an arbitrary audio output
170 schoenebeck 222 method (ALSA / JACK) and an arbitrary audio output channel
171 schoenebeck 151 there.</t>
172     </section>
173    
174     <section title="Focus of this protocol">
175     <t>Main focus of this protocol is to provide a way to configure
176     a running LinuxSampler instance and to retrieve information
177     about it. The focus of this protocol is not to provide a way to
178     control synthesis parameters or even to trigger or release
179     notes. Or in other words; the focus are those functionalities
180     which are not covered by MIDI or which may at most be handled
181     via MIDI System Exclusive Messages.</t>
182     </section>
183    
184     <section title="Communication Overview">
185     <t>There are two distinct methods of communication between a
186     running instance of LinuxSampler and one or more control
187     applications, so called "front-ends": a simple request/response
188     communication method used by the clients to give commands to the
189     server as well as to inquire about server's status and a
190     subscribe/notify communication method used by the client to
191     subscribe to and receive notifications of certain events as they
192     happen on the server. The latter needs more effort to be
193     implemented in the front-end application. The two communication
194     methods will be described next.</t>
195    
196     <section title="Request/response communication method">
197 schoenebeck 571 <t>This simple communication method is based on
198     <xref target="RFC793">TCP</xref>. The
199 schoenebeck 151 front-end application establishes a TCP connection to the
200     LinuxSampler instance on a certain host system. Then the
201     front-end application will send certain ASCII based commands
202     as defined in this document (every command line must be CRLF
203     terminated - see "Conventions used in this document" at the
204     beginning of this document) and the LinuxSampler application
205     will response after a certain process time with an
206     appropriate ASCII based answer, also as defined in this
207     document. So this TCP communication is simply based on query
208     and answer paradigm. That way LinuxSampler is only able to
209     answer on queries from front-ends, but not able to
210     automatically send messages to the client if it's not asked
211     to. The fronted should not reconnect to LinuxSampler for
212     every single command, instead it should keep the connection
213     established and simply resend message(s) for subsequent
214     commands. To keep information in the front-end up-to-date
215     the front-end has to periodically send new requests to get
216     the current information from the LinuxSampler instance. This
217     is often referred to as "polling". While polling is simple
218     to implement and may be OK to use in some cases, there may
219     be disadvantages to polling such as network traffic overhead
220     and information being out of date.
221     It is possible for a client or several clients to open more
222     than one connection to the server at the same time. It is
223     also possible to send more than one request to the server
224     at the same time but if those requests are sent over the
225     same connection server MUST execute them sequentially. Upon
226     executing a request server will produce a result set and
227     send it to the client. Each and every request made by the
228     client MUST result in a result set being sent back to the
229     client. No other data other than a result set may be sent by
230     a server to a client. No result set may be sent to a client
231     without the client sending request to the server first. On
232     any particular connection, result sets MUST be sent in their
233     entirety without being interrupted by other result sets. If
234     several requests got queued up at the server they MUST be
235     processed in the order they were received and result sets
236     MUST be sent back in the same order.</t>
237    
238     <section title="Result format">
239     <t>Result set could be one of the following types:</t>
240     <t>
241     <list style="numbers">
242     <t>Normal</t>
243     <t>Warning</t>
244     <t>Error</t>
245     </list>
246     </t>
247     <t>Warning and Error result sets MUST be single line and
248     have the following format:</t>
249     <t>
250     <list style="symbols">
251     <t>"WRN:&lt;warning-code&gt;:&lt;warning-message&gt;"</t>
252     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;"</t>
253     </list>
254     </t>
255     <t>Where &lt;warning-code&gt; and &lt;error-code&gt; are
256     numeric unique identifiers of the warning or error and
257     &lt;warning-message&gt; and &lt;error-message&gt; are
258     human readable descriptions of the warning or error
259     respectively.</t>
260 schoenebeck 494 <t>Examples:</t>
261     <t>
262     <list>
263     <t>C: "LOAD INSTRUMENT '/home/me/Boesendorfer24bit.gig" 0 0</t>
264     <t>S: "WRN:32:This is a 24 bit patch which is not supported natively yet."</t>
265     </list>
266     </t>
267     <t>
268     <list>
269     <t>C: "GET AUDIO_OUTPUT_DRIVER_PARAMETER INFO ALSA EAR"</t>
270     <t>S: "ERR:3456:Audio output driver 'ALSA' does not have a parameter 'EAR'."</t>
271     </list>
272     </t>
273     <t>
274     <list>
275     <t>C: "GET AUDIO_OUTPUT_DEVICE INFO 123456"</t>
276     <t>S: "ERR:9:There is no audio output device with index 123456."</t>
277     </list>
278 schoenebeck 499 </t>
279 schoenebeck 151 <t>Normal result sets could be:</t>
280     <t>
281     <list style="numbers">
282     <t>Empty</t>
283     <t>Single line</t>
284     <t>Multi-line</t>
285     </list>
286     </t>
287     <t> Empty result set is issued when the server only
288     needed to acknowledge the fact that the request was
289     received and it was processed successfully and no
290     additional information is available. This result set has
291     the following format:</t>
292     <t>
293     <list>
294     <t>"OK"</t>
295     </list>
296     </t>
297 schoenebeck 494 <t>Example:</t>
298     <t>
299     <list>
300     <t>C: "SET AUDIO_OUTPUT_DEVICE_PARAMETER 0 CHANNELS=4"</t>
301     <t>S: "OK"</t>
302     </list>
303     </t>
304 schoenebeck 151 <t>Single line result sets are command specific. One
305     example of a single line result set is an empty line.
306     Multi-line result sets are command specific and may
307     include one or more lines of information. They MUST
308     always end with the following line:</t>
309     <t>
310     <list>
311     <t>"."</t>
312     </list>
313     </t>
314 schoenebeck 494 <t>Example:</t>
315     <t>
316     <list>
317     <t>C: "GET AUDIO_OUTPUT_DEVICE INFO 0"</t>
318     <t>S: "DRIVER: ALSA"</t>
319     <t>&nbsp;&nbsp;&nbsp;"CHANNELS: 2"</t>
320     <t>&nbsp;&nbsp;&nbsp;"SAMPLERATE: 44100"</t>
321     <t>&nbsp;&nbsp;&nbsp;"ACTIVE: true"</t>
322     <t>&nbsp;&nbsp;&nbsp;"FRAGMENTS: 2"</t>
323     <t>&nbsp;&nbsp;&nbsp;"FRAGMENTSIZE: 128"</t>
324     <t>&nbsp;&nbsp;&nbsp;"CARD: '0,0'"</t>
325     <t>&nbsp;&nbsp;&nbsp;"."</t>
326     </list>
327     </t>
328 schoenebeck 151 <t>In addition to above mentioned formats, warnings and
329     empty result sets MAY be indexed. In this case, they
330     have the following formats respectively:</t>
331     <t>
332     <list style="symbols">
333     <t>"WRN[&lt;index&gt;]:&lt;warning-code&gt;:&lt;warning-message&gt;"</t>
334     <t>"OK[&lt;index&gt;]"</t>
335     </list>
336     </t>
337     <t>where &lt;index&gt; is command specific and is used
338     to indicate channel number that the result set was
339     related to or other integer value.</t>
340     <t>Each line of the result set MUST end with
341     &lt;CRLF&gt;.</t>
342 schoenebeck 494 <t>Examples:</t>
343     <t>
344     <list>
345     <t>C: "ADD CHANNEL"</t>
346     <t>S: "OK[12]"</t>
347     </list>
348     </t>
349     <t>
350     <list>
351     <t>C: "CREATE AUDIO_OUTPUT_DEVICE ALSA SAMPLERATE=96000"</t>
352     <t>S: "WRN[0]:32:Sample rate not supported, using 44100 instead."</t>
353     </list>
354     </t>
355 schoenebeck 151 </section>
356     </section>
357     <section title="Subscribe/notify communication method">
358     <t>This more sophisticated communication method is actually
359     only an extension of the simple request/response
360     communication method. The front-end still uses a TCP
361     connection and sends the same commands on the TCP
362     connection. Two extra commands are SUBSCRIBE and UNSUBSCRIBE
363     commands that allow a client to tell the server that it is
364     interested in receiving notifications about certain events
365     as they happen on the server. The SUBSCRIBE command has the
366     following syntax:</t>
367    
368     <t>
369     <list>
370     <t>SUBSCRIBE &lt;event-id&gt;</t>
371     </list>
372     </t>
373    
374     <t>where &lt;event-id&gt; will be replaced by the respective
375     event that client wants to subscribe to. Upon receiving such
376     request, server SHOULD respond with OK and start sending
377     EVENT notifications when a given even has occurred to the
378     front-end when an event has occurred. It MAY be possible
379     certain events may be sent before OK response during real
380     time nature of their generation. Event messages have the
381     following format:</t>
382    
383     <t>
384     <list>
385     <t>NOTIFY:&lt;event-id&gt;:&lt;custom-event-data&gt;</t>
386     </list>
387     </t>
388    
389     <t>where &lt;event-id&gt; uniquely identifies the event that
390     has occurred and &lt;custom-event-data&gt; is event
391     specific.</t>
392    
393     <t>Several rules must be followed by the server when
394     generating events:</t>
395    
396     <t>
397     <list style="numbers">
398     <t>Events MUST NOT be sent to any client who has not
399     issued an appropriate SUBSCRIBE command.</t>
400     <t>Events MUST only be sent using the same
401     connection that was used to subscribe to them.</t>
402     <t>When response is being sent to the client, event
403     MUST be inserted in the stream before or after the
404     response, but NOT in the middle. Same is true about
405     the response. It should never be inserted in the
406     middle of the event message as well as any other
407     response.</t>
408     </list>
409     </t>
410    
411     <t>If the client is not interested in a particular event
412     anymore it MAY issue UNSUBSCRIBE command using the following
413     syntax:</t>
414    
415     <t>
416     <list>
417     <t>UNSUBSCRIBE &lt;event-id&gt;</t>
418     </list>
419     </t>
420    
421     <t>where &lt;event-id&gt; will be replace by the respective
422     event that client is no longer interested in receiving. For
423 schoenebeck 534 a list of supported events see <xref target="events" />.</t>
424 schoenebeck 151
425     <t>Example: the fill states of disk stream buffers have
426     changed on sampler channel 4 and the LinuxSampler instance
427     will react by sending the following message to all clients
428     who subscribed to this event:</t>
429    
430     <t>
431     <list>
432     <t>NOTIFY:CHANNEL_BUFFER_FILL:4 [35]62%,[33]80%,[37]98%</t>
433     </list>
434     </t>
435    
436     <t>Which means there are currently three active streams on
437     sampler channel 4, where the stream with ID "35" is filled
438     by 62%, stream with ID 33 is filled by 80% and stream with
439     ID 37 is filled by 98%.</t>
440    
441     <t>Clients may choose to open more than one connection to
442     the server and use some connections to receive notifications
443     while using other connections to issue commands to the
444     back-end. This is entirely legal and up to the
445     implementation. This does not change the protocol in any way
446     and no special restrictions exist on the server to allow or
447     disallow this or to track what connections belong to what
448     front-ends. Server will listen on a single port, accept
449     multiple connections and support protocol described in this
450     specification in it's entirety on this single port on each
451     connection that it accepted.</t>
452    
453     <t>Due to the fact that TCP is used for this communication,
454     dead peers will be detected automatically by the OS TCP
455     stack. While it may take a while to detect dead peers if no
456     traffic is being sent from server to client (TCP keep-alive
457     timer is set to 2 hours on many OSes) it will not be an
458     issue here as when notifications are sent by the server,
459     dead client will be detected quickly.</t>
460    
461     <t>When connection is closed for any reason server MUST
462     forget all subscriptions that were made on this connection.
463     If client reconnects it MUST resubscribe to all events that
464     it wants to receive.</t>
465    
466     </section>
467     </section>
468    
469 schoenebeck 573 <section title="Description for control commands" anchor="control_commands">
470 schoenebeck 151 <t>This chapter will describe the available control commands
471     that can be sent on the TCP connection in detail. Some certain
472 schoenebeck 534 commands (e.g. <xref target="GET CHANNEL INFO">"GET CHANNEL INFO"</xref>
473     or <xref target="GET ENGINE INFO">"GET ENGINE INFO"</xref>) lead to
474 schoenebeck 151 multiple-line responses. In this case LinuxSampler signals the
475     end of the response by a "." (single dot) line.</t>
476    
477     <section title="Ignored lines and comments">
478     <t>White lines, that is lines which only contain space and
479     tabulator characters, and lines that start with a "#"
480     character are ignored, thus it's possible for example to
481     group commands and to place comments in a LSCP script
482     file.</t>
483     </section>
484    
485     <section title="Configuring audio drivers">
486     <t>Instances of drivers in LinuxSampler are called devices.
487     You can use multiple audio devices simultaneously, e.g. to
488 schoenebeck 222 output the sound of one sampler channel using the ALSA audio
489 schoenebeck 151 output driver, and on another sampler channel you might want
490 schoenebeck 222 to use the JACK audio output driver. For particular audio
491 schoenebeck 151 output systems it's also possible to create several devices
492 schoenebeck 222 of the same audio output driver, e.g. two separate ALSA
493 schoenebeck 151 audio output devices for using two different sound cards at
494     the same time. This chapter describes all commands to
495     configure LinuxSampler's audio output devices and their
496     parameters.</t>
497    
498     <t>Instead of defining commands and parameters for each
499     driver individually, all possible parameters, their meanings
500     and possible values have to be obtained at runtime. This
501     makes the protocol a bit abstract, but has the advantage,
502     that front-ends can be written independently of what drivers
503     are currently implemented and what parameters these drivers
504     are actually offering. This means front-ends can even handle
505     drivers which are implemented somewhere in future without
506     modifying the front-end at all.</t>
507    
508     <t>Note: examples in this chapter showing particular
509     parameters of drivers are not meant as specification of the
510     drivers' parameters. Driver implementations in LinuxSampler
511     might have complete different parameter names and meanings
512     than shown in these examples or might change in future, so
513     these examples are only meant for showing how to retrieve
514     what parameters drivers are offering, how to retrieve their
515     possible values, etc.</t>
516    
517 schoenebeck 534 <section title="Getting amount of available audio output drivers" anchor="GET AVAILABLE_AUDIO_OUTPUT_DRIVERS">
518     <t>Use the following command to get the number of
519     audio output drivers currently available for the
520     LinuxSampler instance:</t>
521     <t>
522     <list>
523     <t>GET AVAILABLE_AUDIO_OUTPUT_DRIVERS</t>
524     </list>
525     </t>
526     <t>Possible Answers:</t>
527     <t>
528     <list>
529     <t>LinuxSampler will answer by sending the
530     number of audio output drivers.</t>
531     </list>
532     </t>
533     <t>Example:</t>
534     <t>
535     <list>
536     <t>C: "GET AVAILABLE_AUDIO_OUTPUT_DRIVERS"</t>
537     <t>S: "2"</t>
538     </list>
539     </t>
540     </section>
541    
542     <section title="Getting all available audio output drivers" anchor="LIST AVAILABLE_AUDIO_OUTPUT_DRIVERS">
543 schoenebeck 151 <t>Use the following command to list all audio output
544     drivers currently available for the LinuxSampler
545     instance:</t>
546     <t>
547     <list>
548 schoenebeck 534 <t>LIST AVAILABLE_AUDIO_OUTPUT_DRIVERS</t>
549 schoenebeck 151 </list>
550     </t>
551     <t>Possible Answers:</t>
552     <t>
553     <list>
554     <t>LinuxSampler will answer by sending comma
555     separated character strings, each symbolizing an
556     audio output driver.</t>
557     </list>
558     </t>
559     <t>Example:</t>
560     <t>
561     <list>
562 schoenebeck 534 <t>C: "LIST AVAILABLE_AUDIO_OUTPUT_DRIVERS"</t>
563 schoenebeck 222 <t>S: "ALSA,JACK"</t>
564 schoenebeck 151 </list>
565     </t>
566     </section>
567    
568     <section title="Getting information about a specific audio
569 schoenebeck 534 output driver" anchor="GET AUDIO_OUTPUT_DRIVER INFO">
570 schoenebeck 151 <t>Use the following command to get detailed information
571     about a specific audio output driver:</t>
572     <t>
573     <list>
574     <t>GET AUDIO_OUTPUT_DRIVER INFO
575     &lt;audio-output-driver&gt;</t>
576     </list>
577     </t>
578     <t>Where &lt;audio-output-driver&gt; is the name of the
579 schoenebeck 534 audio output driver, returned by the
580     <xref target="LIST AVAILABLE_AUDIO_OUTPUT_DRIVERS">"LIST AVAILABLE_AUDIO_OUTPUT_DRIVERS"</xref> command.</t>
581 schoenebeck 151 <t>Possible Answers:</t>
582     <t>
583     <list>
584     <t>LinuxSampler will answer by sending a
585     &lt;CRLF&gt; separated list. Each answer line
586     begins with the information category name
587     followed by a colon and then a space character
588     &lt;SP&gt; and finally the info character string
589     to that info category. At the moment the
590     following information categories are
591     defined:</t>
592    
593     <t>
594     <list>
595     <t>DESCRIPTION -
596     <list>
597     <t> character string describing the
598     audio output driver</t>
599     </list>
600     </t>
601    
602     <t>VERSION -
603     <list>
604     <t>character string reflecting the
605     driver's version</t>
606     </list>
607     </t>
608    
609     <t>PARAMETERS -
610     <list>
611     <t>comma separated list of all
612     parameters available for the given
613     audio output driver, at least
614     parameters 'channels', 'samplerate'
615     and 'active' are offered by all audio
616     output drivers</t>
617     </list>
618     </t>
619     </list>
620     </t>
621    
622     <t>The mentioned fields above don't have to be
623     in particular order.</t>
624     </list>
625     </t>
626     <t>Example:</t>
627     <t>
628     <list>
629 schoenebeck 222 <t>C: "GET AUDIO_OUTPUT_DRIVER INFO ALSA"</t>
630 schoenebeck 151 <t>S: "DESCRIPTION: Advanced Linux Sound
631     Architecture"</t>
632     <t>&nbsp;&nbsp;&nbsp;"VERSION: 1.0"</t>
633     <t>&nbsp;&nbsp;&nbsp;"PARAMETERS:
634 schoenebeck 222 DRIVER,CHANNELS,SAMPLERATE,ACTIVE,FRAGMENTS,
635     FRAGMENTSIZE,CARD"</t>
636 schoenebeck 151 <t>&nbsp;&nbsp;&nbsp;"."</t>
637     </list>
638     </t>
639     </section>
640    
641     <section title="Getting information about specific audio
642 schoenebeck 534 output driver parameter" anchor="GET AUDIO_OUTPUT_DRIVER_PARAMETER INFO">
643 schoenebeck 151 <t>Use the following command to get detailed information
644     about a specific audio output driver parameter:</t>
645     <t>
646     <list>
647     <t>GET AUDIO_OUTPUT_DRIVER_PARAMETER INFO &lt;audio&gt; &lt;prm&gt; [&lt;deplist&gt;]</t>
648     </list>
649     </t>
650     <t>Where &lt;audio&gt; is the name of the audio output
651 schoenebeck 534 driver as returned by the <xref target="LIST AVAILABLE_AUDIO_OUTPUT_DRIVERS">
652     "LIST AVAILABLE_AUDIO_OUTPUT_DRIVERS"</xref> command,
653 schoenebeck 151 &lt;prm&gt; a specific parameter name for which information should be
654 schoenebeck 534 obtained (as returned by the
655     <xref target="GET AUDIO_OUTPUT_DRIVER INFO">"GET AUDIO_OUTPUT_DRIVER INFO"</xref> command) and
656 schoenebeck 151 &lt;deplist&gt; is an optional list of parameters on which the sought
657     parameter &lt;prm&gt; depends on, &lt;deplist&gt; is a list of key-value
658     pairs in form of "key1=val1 key2=val2 ...", where character string values
659     are encapsulated into apostrophes ('). Arguments given with &lt;deplist&gt;
660     which are not dependency parameters of &lt;prm&gt; will be ignored, means
661     the front-end application can simply put all parameters into &lt;deplist&gt;
662     with the values already selected by the user.</t>
663     <t>Possible Answers:</t>
664     <t>
665     <list>
666     <t>LinuxSampler will answer by sending a
667 schoenebeck 494 &lt;CRLF&gt; separated list.
668 schoenebeck 151 Each answer line begins with the information category name
669     followed by a colon and then a space character &lt;SP&gt; and
670     finally
671     the info character string to that info category. There are
672     information which is always returned, independently of the
673     given driver parameter and there are optional information
674     which is only shown dependently to given driver parameter. At
675     the moment the following information categories are defined:</t>
676     </list>
677     </t>
678    
679     <t>
680     <list>
681     <t>TYPE -
682     <list>
683     <t>either "BOOL" for boolean value(s) or
684     "INT" for integer
685     value(s) or "FLOAT" for dotted number(s) or "STRING" for
686     character string(s)
687     (always returned, no matter which driver parameter)</t>
688     </list>
689     </t>
690    
691     <t>DESCRIPTION -
692     <list>
693     <t>arbitrary text describing the purpose of the parameter
694     (always returned, no matter which driver parameter)</t>
695     </list>
696     </t>
697    
698     <t>MANDATORY -
699     <list>
700     <t>either true or false, defines if this parameter must be
701     given when the device is to be created with the
702 schoenebeck 534 <xref target="CREATE AUDIO_OUTPUT_DEVICE">'CREATE AUDIO_OUTPUT_DEVICE'</xref>
703     command (always returned, no matter which driver parameter)</t>
704 schoenebeck 151 </list>
705     </t>
706    
707     <t>FIX -
708     <list>
709     <t>either true or false, if false then this parameter can
710     be changed at any time, once the device is created by
711 schoenebeck 534 the <xref target="CREATE AUDIO_OUTPUT_DEVICE">'CREATE AUDIO_OUTPUT_DEVICE'</xref>
712     command (always returned, no matter which driver parameter)</t>
713 schoenebeck 151 </list>
714     </t>
715    
716     <t>MULTIPLICITY -
717     <list>
718     <t>either true or false, defines if this parameter allows
719     only one value or a list of values, where true means
720     multiple values and false only a single value allowed
721     (always returned, no matter which driver parameter)</t>
722     </list>
723     </t>
724    
725     <t>DEPENDS -
726     <list>
727 schoenebeck 561 <t>comma separated list of parameters this parameter depends
728 schoenebeck 151 on, means the values for fields 'DEFAULT', 'RANGE_MIN',
729     'RANGE_MAX' and 'POSSIBILITIES' might depend on these
730     listed parameters, for example assuming that an audio
731 schoenebeck 222 driver (like the ALSA driver) offers parameters 'card'
732 schoenebeck 151 and 'samplerate' then parameter 'samplerate' would
733     depend on 'card' because the possible values for
734     'samplerate' depends on the sound card which can be
735     chosen by the 'card' parameter
736     (optionally returned, dependent to driver parameter)</t>
737     </list>
738     </t>
739    
740     <t>DEFAULT -
741     <list>
742     <t>reflects the default value for this parameter which is
743     used when the device is created and not explicitly
744 schoenebeck 534 given with the <xref target="CREATE AUDIO_OUTPUT_DEVICE">
745     'CREATE AUDIO_OUTPUT_DEVICE'</xref> command,
746 schoenebeck 151 in case of MULTIPLCITY=true, this is a comma separated
747     list, that's why character strings are encapsulated into
748     apostrophes (')
749     (optionally returned, dependent to driver parameter)</t>
750     </list>
751     </t>
752    
753     <t>RANGE_MIN -
754     <list>
755     <t>defines lower limit of the allowed value range for this
756     parameter, can be an integer value as well as a dotted
757     number, this parameter is often used in conjunction
758     with RANGE_MAX, but may also appear without
759     (optionally returned, dependent to driver parameter)</t>
760     </list>
761     </t>
762    
763     <t>RANGE_MAX -
764     <list>
765     <t>defines upper limit of the allowed value range for this
766     parameter, can be an integer value as well as a dotted
767     number, this parameter is often used in conjunction with
768     RANGE_MIN, but may also appear without
769     (optionally returned, dependent to driver parameter)</t>
770     </list>
771     </t>
772    
773 schoenebeck 494 <t>POSSIBILITIES -
774 schoenebeck 151 <list>
775     <t>comma separated list of possible values for this
776     parameter, character strings are encapsulated into
777     apostrophes
778     (optionally returned, dependent to driver parameter)</t>
779     </list>
780     </t>
781     </list>
782     </t>
783    
784     <t>The mentioned fields above don't have to be in particular order.</t>
785    
786     <t>Examples:</t>
787     <t>
788     <list>
789 schoenebeck 222 <t>C: "GET AUDIO_OUTPUT_DRIVER_PARAMETER INFO ALSA CARD"</t>
790 schoenebeck 151 <t>S: "DESCRIPTION: sound card to be used"</t>
791     <t>&nbsp;&nbsp;&nbsp;"TYPE: STRING"</t>
792     <t>&nbsp;&nbsp;&nbsp;"MANDATORY: false"</t>
793     <t>&nbsp;&nbsp;&nbsp;"FIX: true"</t>
794     <t>&nbsp;&nbsp;&nbsp;"MULTIPLICITY: false"</t>
795     <t>&nbsp;&nbsp;&nbsp;"DEFAULT: '0,0'"</t>
796 schoenebeck 494 <t>&nbsp;&nbsp;&nbsp;"POSSIBILITIES: '0,0','1,0','2,0'"</t>
797 schoenebeck 151 <t>&nbsp;&nbsp;&nbsp;"."</t>
798     </list>
799     </t>
800     <t>
801     <list>
802 schoenebeck 222 <t>C: "GET AUDIO_OUTPUT_DRIVER_PARAMETER INFO ALSA SAMPLERATE"</t>
803 schoenebeck 151 <t>S: "DESCRIPTION: output sample rate in Hz"</t>
804     <t>&nbsp;&nbsp;&nbsp;"TYPE: INT"</t>
805     <t>&nbsp;&nbsp;&nbsp;"MANDATORY: false"</t>
806     <t>&nbsp;&nbsp;&nbsp;"FIX: false"</t>
807     <t>&nbsp;&nbsp;&nbsp;"MULTIPLICITY: false"</t>
808     <t>&nbsp;&nbsp;&nbsp;"DEPENDS: card"</t>
809     <t>&nbsp;&nbsp;&nbsp;"DEFAULT: 44100"</t>
810     <t>&nbsp;&nbsp;&nbsp;"."</t>
811     </list>
812     </t>
813     <t>
814     <list>
815 schoenebeck 222 <t>C: "GET AUDIO_OUTPUT_DRIVER_PARAMETER INFO ALSA SAMPLERATE CARD='0,0'"</t>
816 schoenebeck 151 <t>S: "DESCRIPTION: output sample rate in Hz"</t>
817     <t>&nbsp;&nbsp;&nbsp;"TYPE: INT"</t>
818     <t>&nbsp;&nbsp;&nbsp;"MANDATORY: false"</t>
819     <t>&nbsp;&nbsp;&nbsp;"FIX: false"</t>
820     <t>&nbsp;&nbsp;&nbsp;"MULTIPLICITY: false"</t>
821     <t>&nbsp;&nbsp;&nbsp;"DEPENDS: card"</t>
822     <t>&nbsp;&nbsp;&nbsp;"DEFAULT: 44100"</t>
823     <t>&nbsp;&nbsp;&nbsp;"RANGE_MIN: 22050"</t>
824     <t>&nbsp;&nbsp;&nbsp;"RANGE_MAX: 96000"</t>
825     <t>&nbsp;&nbsp;&nbsp;"."</t>
826     </list>
827     </t>
828     </section>
829    
830 schoenebeck 534 <section title="Creating an audio output device" anchor="CREATE AUDIO_OUTPUT_DEVICE">
831 schoenebeck 151 <t>Use the following command to create a new audio output device for the desired audio output system:</t>
832    
833     <t>
834     <list>
835     <t>CREATE AUDIO_OUTPUT_DEVICE &lt;audio-output-driver&gt; [&lt;param-list&gt;]</t>
836     </list>
837     </t>
838    
839     <t>Where &lt;audio-output-driver&gt; should be replaced by the desired audio
840 schoenebeck 571 output system as returned by the
841     <xref target="LIST AVAILABLE_AUDIO_OUTPUT_DRIVERS">"LIST AVAILABLE_AUDIO_OUTPUT_DRIVERS"</xref>
842     command and &lt;param-list&gt; by an optional list of driver
843 schoenebeck 151 specific parameters in form of "key1=val1 key2=val2 ...", where
844     character string values should be encapsulated into apostrophes (').
845     Note that there might be drivers which require parameter(s) to be
846     given with this command. Use the previously described commands in
847     this chapter to get this information.</t>
848    
849     <t>Possible Answers:</t>
850     <t>
851     <list>
852     <t>"OK[&lt;device-id&gt;]" -
853     <list>
854     <t>in case the device was successfully created, where
855     &lt;device-id&gt; is the numerical ID of the new device</t>
856     </list>
857     </t>
858     <t>"WRN[&lt;device-id&gt;]:&lt;warning-code&gt;:&lt;warning-message&gt;" -
859     <list>
860     <t>in case the device was created successfully, where
861     &lt;device-id&gt; is the numerical ID of the new device, but there
862     are noteworthy issue(s) related (e.g. sound card doesn't
863     support given hardware parameters and the driver is using
864     fall-back values), providing an appropriate warning code and
865     warning message</t>
866     </list>
867     </t>
868     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
869     <list>
870     <t>in case it failed, providing an appropriate error code and error message</t>
871     </list>
872     </t>
873     </list>
874     </t>
875     <t>Examples:</t>
876     <t>
877     <list>
878 schoenebeck 222 <t>C: "CREATE AUDIO_OUTPUT_DEVICE ALSA"</t>
879 schoenebeck 151 <t>S: "OK[0]"</t>
880     </list>
881     </t>
882     <t>
883     <list>
884 schoenebeck 222 <t>C: "CREATE AUDIO_OUTPUT_DEVICE ALSA CARD='2,0' SAMPLERATE=96000"</t>
885 schoenebeck 151 <t>S: "OK[1]"</t>
886     </list>
887     </t>
888     </section>
889    
890 schoenebeck 534 <section title="Destroying an audio output device" anchor="DESTROY AUDIO_OUTPUT_DEVICE">
891 schoenebeck 151 <t>Use the following command to destroy a created output device:</t>
892     <t>
893     <list>
894     <t>DESTROY AUDIO_OUTPUT_DEVICE &lt;device-id&gt;</t>
895     </list>
896     </t>
897     <t>Where &lt;device-id&gt; should be replaced by the numerical ID of the
898 schoenebeck 534 audio output device as given by the
899     <xref target="CREATE AUDIO_OUTPUT_DEVICE">"CREATE AUDIO_OUTPUT_DEVICE"</xref>
900     or <xref target="LIST AUDIO_OUTPUT_DEVICES">"LIST AUDIO_OUTPUT_DEVICES"</xref>
901     command.</t>
902 schoenebeck 151 <t>Possible Answers:</t>
903     <t>
904     <list>
905     <t>"OK" -
906     <list>
907     <t>in case the device was successfully destroyed</t>
908     </list>
909     </t>
910     <t>"WRN:&lt;warning-code&gt;:&lt;warning-message&gt;" -
911     <list>
912     <t>in case the device was destroyed successfully, but there are
913     noteworthy issue(s) related (e.g. an audio over ethernet
914     driver was unloaded but the other host might not be
915     informed about this situation), providing an appropriate
916     warning code and warning message</t>
917     </list>
918     </t>
919     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
920     <list>
921     <t>in case it failed, providing an appropriate error code and
922     error message</t>
923     </list>
924     </t>
925     </list>
926     </t>
927     <t>Example:</t>
928     <t>
929     <list>
930     <t>C: "DESTROY AUDIO_OUTPUT_DEVICE 0"</t>
931     <t>S: "OK"</t>
932     </list>
933     </t>
934     </section>
935    
936 schoenebeck 534 <section title="Getting all created audio output device count" anchor="GET AUDIO_OUTPUT_DEVICES">
937 schoenebeck 151 <t>Use the following command to count all created audio output devices:</t>
938     <t>
939     <list>
940     <t>GET AUDIO_OUTPUT_DEVICES</t>
941     </list>
942     </t>
943     <t>Possible Answers:</t>
944     <t>
945     <list>
946     <t>LinuxSampler will answer by sending the current number of all
947     audio output devices.</t>
948     </list>
949     </t>
950     <t>Example:</t>
951     <t>
952     <list>
953     <t>C: "GET AUDIO_OUTPUT_DEVICES"</t>
954     <t>S: "4"</t>
955     </list>
956     </t>
957     </section>
958    
959 schoenebeck 534 <section title="Getting all created audio output device list" anchor="LIST AUDIO_OUTPUT_DEVICES">
960 schoenebeck 151 <t>Use the following command to list all created audio output devices:</t>
961     <t>
962     <list>
963     <t>LIST AUDIO_OUTPUT_DEVICES</t>
964     </list>
965     </t>
966     <t>Possible Answers:</t>
967     <t>
968     <list>
969     <t>LinuxSampler will answer by sending a comma separated list with
970     the numerical IDs of all audio output devices.</t>
971     </list>
972     </t>
973     <t>Example:</t>
974     <t>
975     <list>
976     <t>C: "LIST AUDIO_OUTPUT_DEVICES"</t>
977     <t>S: "0,1,4,5"</t>
978     </list>
979     </t>
980     </section>
981    
982 schoenebeck 534 <section title="Getting current settings of an audio output device" anchor="GET AUDIO_OUTPUT_DEVICE INFO">
983 schoenebeck 151 <t>Use the following command to get current settings of a specific, created audio output device:</t>
984     <t>
985     <list>
986     <t>GET AUDIO_OUTPUT_DEVICE INFO &lt;device-id&gt;</t>
987     </list>
988     </t>
989 schoenebeck 494 <t>Where &lt;device-id&gt; should be replaced by numerical ID
990 schoenebeck 151 of the audio output device as e.g. returned by the
991 schoenebeck 534 <xref target="LIST AUDIO_OUTPUT_DEVICES">"LIST AUDIO_OUTPUT_DEVICES"</xref> command.</t>
992 schoenebeck 151 <t>Possible Answers:</t>
993     <t>LinuxSampler will answer by sending a &lt;CRLF&gt; separated list.
994     Each answer line begins with the information category name
995     followed by a colon and then a space character &lt;SP&gt; and finally
996     the info character string to that info category. As some
997     parameters might allow multiple values, character strings are
998     encapsulated into apostrophes ('). At the moment the following
999     information categories are defined (independently of device):</t>
1000     <t>
1001     <list>
1002 schoenebeck 222 <t>DRIVER -
1003 schoenebeck 151 <list>
1004     <t>identifier of the used audio output driver, as also
1005 schoenebeck 534 returned by the
1006     <xref target="LIST AVAILABLE_AUDIO_OUTPUT_DRIVERS">
1007     "LIST AVAILABLE_AUDIO_OUTPUT_DRIVERS"</xref>
1008 schoenebeck 151 command</t>
1009     </list>
1010     </t>
1011 schoenebeck 222 <t>CHANNELS -
1012 schoenebeck 151 <list>
1013     <t>amount of audio output channels this device currently
1014     offers</t>
1015     </list>
1016     </t>
1017 schoenebeck 222 <t>SAMPLERATE -
1018 schoenebeck 151 <list>
1019     <t>playback sample rate the device uses</t>
1020     </list>
1021     </t>
1022 schoenebeck 222 <t>ACTIVE -
1023 schoenebeck 151 <list>
1024     <t>either true or false, if false then the audio device is
1025     inactive and doesn't output any sound, nor do the
1026     sampler channels connected to this audio device render
1027     any audio</t>
1028     </list>
1029     </t>
1030     </list>
1031     </t>
1032     <t>The mentioned fields above don't have to be in particular
1033     order. The fields above are only those fields which are
1034     returned by all audio output devices. Every audio output driver
1035     might have its own, additional driver specific parameters (see
1036 schoenebeck 534 <xref target="GET AUDIO_OUTPUT_DRIVER INFO" />)
1037     which are also returned by this command.</t>
1038 schoenebeck 151 <t>Example:</t>
1039     <t>
1040     <list>
1041     <t>C: "GET AUDIO_OUTPUT_DEVICE INFO 0"</t>
1042 schoenebeck 222 <t>S: "DRIVER: ALSA"</t>
1043     <t>&nbsp;&nbsp;&nbsp;"CHANNELS: 2"</t>
1044     <t>&nbsp;&nbsp;&nbsp;"SAMPLERATE: 44100"</t>
1045     <t>&nbsp;&nbsp;&nbsp;"ACTIVE: true"</t>
1046     <t>&nbsp;&nbsp;&nbsp;"FRAGMENTS: 2"</t>
1047     <t>&nbsp;&nbsp;&nbsp;"FRAGMENTSIZE: 128"</t>
1048     <t>&nbsp;&nbsp;&nbsp;"CARD: '0,0'"</t>
1049 schoenebeck 151 <t>&nbsp;&nbsp;&nbsp;"."</t>
1050     </list>
1051     </t>
1052     </section>
1053    
1054    
1055 schoenebeck 534 <section title="Changing settings of audio output devices" anchor="SET AUDIO_OUTPUT_DEVICE_PARAMETER">
1056 schoenebeck 151 <t>Use the following command to alter a specific setting of a created audio output device:</t>
1057     <t>
1058     <list>
1059     <t>SET AUDIO_OUTPUT_DEVICE_PARAMETER &lt;device-id&gt; &lt;key&gt;=&lt;value&gt;</t>
1060     </list>
1061     </t>
1062     <t>Where &lt;device-id&gt; should be replaced by the numerical ID of the
1063 schoenebeck 571 audio output device as given by the
1064     <xref target="CREATE AUDIO_OUTPUT_DEVICE">"CREATE AUDIO_OUTPUT_DEVICE"</xref>
1065     or <xref target="LIST AUDIO_OUTPUT_DEVICES">"LIST AUDIO_OUTPUT_DEVICES"</xref>
1066     command, &lt;key&gt; by the name of the parameter to change
1067 schoenebeck 151 and &lt;value&gt; by the new value for this parameter.</t>
1068     <t>Possible Answers:</t>
1069     <t>
1070     <list>
1071     <t>"OK" -
1072     <list>
1073     <t>in case setting was successfully changed</t>
1074     </list>
1075     </t>
1076     <t>"WRN:&lt;warning-code&gt;:&lt;warning-message&gt;" -
1077     <list>
1078     <t>in case setting was changed successfully, but there are
1079     noteworthy issue(s) related, providing an appropriate
1080     warning code and warning message</t>
1081     </list>
1082     </t>
1083     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
1084     <list>
1085     <t>in case it failed, providing an appropriate error code and
1086     error message</t>
1087     </list>
1088     </t>
1089     </list>
1090     </t>
1091     <t>Example:</t>
1092     <t>
1093     <list>
1094 schoenebeck 222 <t>C: "SET AUDIO_OUTPUT_DEVICE_PARAMETER 0 FRAGMENTSIZE=128"</t>
1095 schoenebeck 151 <t>S: "OK"</t>
1096     </list>
1097     </t>
1098     </section>
1099    
1100 schoenebeck 534 <section title="Getting information about an audio channel" anchor="GET AUDIO_OUTPUT_CHANNEL INFO">
1101 schoenebeck 151 <t>Use the following command to get information about an audio channel:</t>
1102     <t>
1103     <list>
1104     <t>GET AUDIO_OUTPUT_CHANNEL INFO &lt;device-id&gt; &lt;audio-chan&gt;</t>
1105     </list>
1106     </t>
1107 schoenebeck 571 <t>Where &lt;device-id&gt; is the numerical ID of the audio output device as given by the
1108     <xref target="CREATE AUDIO_OUTPUT_DEVICE">"CREATE AUDIO_OUTPUT_DEVICE"</xref>
1109     or <xref target="LIST AUDIO_OUTPUT_DEVICES">"LIST AUDIO_OUTPUT_DEVICES"</xref>
1110     command and &lt;audio-chan&gt; the audio channel number.</t>
1111 schoenebeck 151 <t>Possible Answers:</t>
1112     <t>
1113     <list>
1114     <t>LinuxSampler will answer by sending a &lt;CRLF&gt; separated list.
1115     Each answer line begins with the information category name
1116     followed by a colon and then a space character &lt;SP&gt; and finally
1117     the info character string to that info category. At the moment
1118     the following information categories are defined:</t>
1119    
1120     <t>
1121     <list>
1122     <t>NAME -
1123     <list>
1124     <t>arbitrary character string naming the channel, which
1125     doesn't have to be unique (always returned by all audio channels)</t>
1126     </list>
1127     </t>
1128     <t>IS_MIX_CHANNEL -
1129     <list>
1130     <t>either true or false, a mix-channel is not a real,
1131     independent audio channel, but a virtual channel which
1132     is mixed to another real channel, this mechanism is
1133     needed for sampler engines which need more audio
1134     channels than the used audio system might be able to offer
1135     (always returned by all audio channels)</t>
1136     </list>
1137     </t>
1138     <t>MIX_CHANNEL_DESTINATION -
1139     <list>
1140 schoenebeck 494 <t>numerical ID (positive integer including 0)
1141     which reflects the real audio channel (of the same audio
1142 schoenebeck 151 output device) this mix channel refers to, means where
1143     the audio signal actually will be routed / added to
1144     (only returned in case the audio channel is mix channel)</t>
1145     </list>
1146     </t>
1147     </list>
1148     </t>
1149     </list>
1150     </t>
1151    
1152     <t>The mentioned fields above don't have to be in particular
1153     order. The fields above are only those fields which are
1154     generally returned for the described cases by all audio
1155     channels regardless of the audio driver. Every audio channel
1156     might have its own, additional driver and channel specific
1157     parameters.</t>
1158    
1159     <t>Examples:</t>
1160    
1161     <t>
1162     <list>
1163     <t>C: "GET AUDIO_OUTPUT_CHANNEL INFO 0 0"</t>
1164     <t>S: "NAME: studio monitor left"</t>
1165     <t>&nbsp;&nbsp;&nbsp;"IS_MIX_CHANNEL: false"</t>
1166     <t>&nbsp;&nbsp;&nbsp;"."</t>
1167     </list>
1168     </t>
1169    
1170     <t>
1171     <list>
1172     <t>C: "GET AUDIO_OUTPUT_CHANNEL INFO 0 1"</t>
1173     <t>S: "NAME: studio monitor right"</t>
1174     <t>&nbsp;&nbsp;&nbsp;"IS_MIX_CHANNEL: false"</t>
1175     <t>&nbsp;&nbsp;&nbsp;"."</t>
1176     </list>
1177     </t>
1178    
1179     <t>
1180     <list>
1181     <t>C: "GET AUDIO_OUTPUT_CHANNEL INFO 0 2"</t>
1182     <t>S: "NAME: studio monitor left"</t>
1183     <t>&nbsp;&nbsp;&nbsp;"IS_MIX_CHANNEL: true"</t>
1184     <t>&nbsp;&nbsp;&nbsp;"MIX_CHANNEL_DESTINATION: 1"</t>
1185     <t>&nbsp;&nbsp;&nbsp;"."</t>
1186     </list>
1187     </t>
1188    
1189     <t>
1190     <list>
1191     <t>C: "GET AUDIO_OUTPUT_CHANNEL INFO 1 0"</t>
1192     <t>S: "NAME: 'ardour (left)'"</t>
1193     <t>&nbsp;&nbsp;&nbsp;"IS_MIX_CHANNEL: false"</t>
1194 schoenebeck 222 <t>&nbsp;&nbsp;&nbsp;"JACK_BINDINGS: 'ardour:0'"</t>
1195 schoenebeck 151 <t>&nbsp;&nbsp;&nbsp;"."</t>
1196     </list>
1197     </t>
1198     </section>
1199    
1200 schoenebeck 534 <section title="Getting information about specific audio channel parameter" anchor="GET AUDIO_OUTPUT_CHANNEL_PARAMETER INFO">
1201 schoenebeck 151 <t>Use the following command to get detailed information about specific audio channel parameter:</t>
1202    
1203     <t>
1204     <list>
1205     <t>GET AUDIO_OUTPUT_CHANNEL_PARAMETER INFO &lt;dev-id&gt; &lt;chan&gt; &lt;param&gt;</t>
1206     </list>
1207     </t>
1208    
1209 schoenebeck 571 <t>Where &lt;dev-id&gt; is the numerical ID of the audio output device as returned by the
1210     <xref target="CREATE AUDIO_OUTPUT_DEVICE">"CREATE AUDIO_OUTPUT_DEVICE"</xref>
1211     or <xref target="LIST AUDIO_OUTPUT_DEVICES">"LIST AUDIO_OUTPUT_DEVICES"</xref>
1212 schoenebeck 534 command, &lt;chan&gt; the audio channel number
1213 schoenebeck 151 and &lt;param&gt; a specific channel parameter name for which information should
1214 schoenebeck 534 be obtained (as returned by the <xref target="GET AUDIO_OUTPUT_CHANNEL INFO">
1215     "GET AUDIO_OUTPUT_CHANNEL INFO"</xref> command).</t>
1216 schoenebeck 151 <t>Possible Answers:</t>
1217    
1218     <t>
1219     <list>
1220     <t>LinuxSampler will answer by sending a &lt;CRLF&gt; separated list.
1221     Each answer line begins with the information category name
1222     followed by a colon and then a space character &lt;SP&gt; and finally
1223     the info character string to that info category. There are
1224     information which is always returned, independently of the
1225     given channel parameter and there is optional information
1226     which is only shown dependently to the given audio channel. At
1227     the moment the following information categories are defined:</t>
1228     <t>
1229     <list>
1230     <t>TYPE -
1231     <list>
1232     <t>either "BOOL" for boolean value(s) or "INT" for integer
1233     value(s) or "FLOAT" for dotted number(s) or "STRING" for
1234     character string(s)
1235     (always returned)</t>
1236     </list>
1237     </t>
1238     <t>DESCRIPTION -
1239     <list>
1240     <t>arbitrary text describing the purpose of the parameter (always returned)</t>
1241     </list>
1242     </t>
1243     <t>FIX -
1244     <list>
1245     <t>either true or false, if true then this parameter is
1246     read only, thus cannot be altered
1247     (always returned)</t>
1248     </list>
1249     </t>
1250     <t>MULTIPLICITY -
1251     <list>
1252     <t>either true or false, defines if this parameter allows
1253     only one value or a list of values, where true means
1254     multiple values and false only a single value allowed
1255     (always returned)</t>
1256     </list>
1257     </t>
1258     <t>RANGE_MIN -
1259     <list>
1260     <t>defines lower limit of the allowed value range for this
1261     parameter, can be an integer value as well as a dotted
1262     number, usually used in conjunction with 'RANGE_MAX',
1263     but may also appear without
1264     (optionally returned, dependent to driver and channel
1265     parameter)</t>
1266     </list>
1267     </t>
1268     <t>RANGE_MAX -
1269     <list>
1270     <t>defines upper limit of the allowed value range for this
1271     parameter, can be an integer value as well as a dotted
1272     number, usually used in conjunction with 'RANGE_MIN',
1273     but may also appear without
1274     (optionally returned, dependent to driver and channel
1275     parameter)</t>
1276     </list>
1277     </t>
1278 schoenebeck 494 <t>POSSIBILITIES -
1279 schoenebeck 151 <list>
1280     <t>comma separated list of possible values for this
1281     parameter, character strings are encapsulated into
1282     apostrophes
1283     (optionally returned, dependent to driver and channel
1284     parameter)</t>
1285     </list>
1286     </t>
1287     </list>
1288     </t>
1289     <t>The mentioned fields above don't have to be in particular order.</t>
1290     </list>
1291     </t>
1292     <t>Example:</t>
1293     <t>
1294     <list>
1295 schoenebeck 222 <t>C: "GET AUDIO_OUTPUT_CHANNEL_PARAMETER INFO 1 0 JACK_BINDINGS"</t>
1296     <t>S: "DESCRIPTION: bindings to other JACK clients"</t>
1297 schoenebeck 151 <t>&nbsp;&nbsp;&nbsp;"TYPE: STRING"</t>
1298     <t>&nbsp;&nbsp;&nbsp;"FIX: false"</t>
1299     <t>&nbsp;&nbsp;&nbsp;"MULTIPLICITY: true"</t>
1300 schoenebeck 494 <t>&nbsp;&nbsp;&nbsp;"POSSIBILITIES: 'PCM:0','PCM:1','ardour:0','ardour:1'"</t>
1301 schoenebeck 151 <t>&nbsp;&nbsp;&nbsp;"."</t>
1302     </list>
1303     </t>
1304     </section>
1305    
1306 schoenebeck 534 <section title="Changing settings of audio output channels" anchor="SET AUDIO_OUTPUT_CHANNEL_PARAMETER">
1307 schoenebeck 151 <t>Use the following command to alter a specific setting of an audio output channel:</t>
1308     <t>
1309     <list>
1310     <t>SET AUDIO_OUTPUT_CHANNEL_PARAMETER &lt;dev-id&gt; &lt;chn&gt; &lt;key&gt;=&lt;value&gt;</t>
1311     </list>
1312     </t>
1313 schoenebeck 571 <t>Where &lt;dev-id&gt; should be replaced by the numerical ID of the audio output device as returned by the
1314     <xref target="CREATE AUDIO_OUTPUT_DEVICE">"CREATE AUDIO_OUTPUT_DEVICE"</xref>
1315     or <xref target="LIST AUDIO_OUTPUT_DEVICES">"LIST AUDIO_OUTPUT_DEVICES"</xref>
1316     command, &lt;chn&gt; by the audio channel number, &lt;key&gt; by the name of the
1317 schoenebeck 151 parameter to change and &lt;value&gt; by the new value for this parameter.</t>
1318     <t>Possible Answers:</t>
1319     <t>
1320     <list>
1321     <t>"OK" -
1322     <list>
1323     <t>in case setting was successfully changed</t>
1324     </list>
1325     </t>
1326     <t>"WRN:&lt;warning-code&gt;:&lt;warning-message&gt;" -
1327     <list>
1328     <t>in case setting was changed successfully, but there are
1329     noteworthy issue(s) related, providing an appropriate
1330     warning code and warning message</t>
1331     </list>
1332     </t>
1333     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
1334     <list>
1335     <t>in case it failed, providing an appropriate error code and
1336     error message</t>
1337     </list>
1338     </t>
1339     </list>
1340     </t>
1341     <t>Example:</t>
1342     <t>
1343     <list>
1344 schoenebeck 222 <t>C: "SET AUDIO_OUTPUT_CHANNEL PARAMETER 0 0 JACK_BINDINGS='PCM:0'"</t>
1345 schoenebeck 151 <t>S: "OK"</t>
1346     </list>
1347     </t>
1348     <t>
1349     <list>
1350     <t>C: "SET AUDIO_OUTPUT_CHANNEL PARAMETER 0 0 NAME='monitor left'"</t>
1351     <t>S: "OK"</t>
1352     </list>
1353     </t>
1354     </section>
1355     </section>
1356    
1357     <section title="Configuring MIDI input drivers">
1358     <t>Instances of drivers in LinuxSampler are called devices. You can use
1359     multiple MIDI devices simultaneously, e.g. to use MIDI over ethernet as
1360 schoenebeck 222 MIDI input on one sampler channel and ALSA as MIDI input on another sampler
1361 schoenebeck 151 channel. For particular MIDI input systems it's also possible to create
1362     several devices of the same MIDI input type. This chapter describes all
1363     commands to configure LinuxSampler's MIDI input devices and their parameters.</t>
1364    
1365     <t>Instead of defining commands and parameters for each driver individually,
1366     all possible parameters, their meanings and possible values have to be obtained
1367     at runtime. This makes the protocol a bit abstract, but has the advantage, that
1368     front-ends can be written independently of what drivers are currently implemented
1369     and what parameters these drivers are actually offering. This means front-ends can
1370     even handle drivers which are implemented somewhere in future without modifying
1371     the front-end at all.</t>
1372    
1373     <t>Commands for configuring MIDI input devices are pretty much the same as the
1374     commands for configuring audio output drivers, already described in the last
1375     chapter.</t>
1376    
1377     <t>Note: examples in this chapter showing particular parameters of drivers are
1378     not meant as specification of the drivers' parameters. Driver implementations in
1379     LinuxSampler might have complete different parameter names and meanings than shown
1380     in these examples or might change in future, so these examples are only meant for
1381     showing how to retrieve what parameters drivers are offering, how to retrieve their
1382     possible values, etc.</t>
1383    
1384 schoenebeck 534 <section title="Getting amount of available MIDI input drivers" anchor="GET AVAILABLE_MIDI_INPUT_DRIVERS">
1385     <t>Use the following command to get the number of
1386     MIDI input drivers currently available for the
1387     LinuxSampler instance:</t>
1388     <t>
1389     <list>
1390     <t>GET AVAILABLE_MIDI_INPUT_DRIVERS</t>
1391     </list>
1392     </t>
1393     <t>Possible Answers:</t>
1394     <t>
1395     <list>
1396     <t>LinuxSampler will answer by sending the
1397     number of available MIDI input drivers.</t>
1398     </list>
1399     </t>
1400     <t>Example:</t>
1401     <t>
1402     <list>
1403     <t>C: "GET AVAILABLE_MIDI_INPUT_DRIVERS"</t>
1404     <t>S: "2"</t>
1405     </list>
1406     </t>
1407     </section>
1408    
1409     <section title="Getting all available MIDI input drivers" anchor="LIST AVAILABLE_MIDI_INPUT_DRIVERS">
1410 schoenebeck 151 <t>Use the following command to list all MIDI input drivers currently available
1411     for the LinuxSampler instance:</t>
1412     <t>
1413     <list>
1414 schoenebeck 534 <t>LIST AVAILABLE_MIDI_INPUT_DRIVERS</t>
1415 schoenebeck 151 </list>
1416     </t>
1417     <t>Possible Answers:</t>
1418     <t>
1419     <list>
1420     <t>LinuxSampler will answer by sending comma separated character
1421     strings, each symbolizing a MIDI input driver.</t>
1422     </list>
1423     </t>
1424     <t>Example:</t>
1425     <t>
1426     <list>
1427 schoenebeck 534 <t>C: "LIST AVAILABLE_MIDI_INPUT_DRIVERS"</t>
1428 schoenebeck 222 <t>S: "ALSA,JACK"</t>
1429 schoenebeck 151 </list>
1430     </t>
1431     </section>
1432    
1433 schoenebeck 534 <section title="Getting information about a specific MIDI input driver" anchor="GET MIDI_INPUT_DRIVER INFO">
1434 schoenebeck 151 <t>Use the following command to get detailed information about a specific MIDI input driver:</t>
1435     <t>
1436     <list>
1437     <t>GET MIDI_INPUT_DRIVER INFO &lt;midi-input-driver&gt;</t>
1438     </list>
1439     </t>
1440 schoenebeck 571 <t>Where &lt;midi-input-driver&gt; is the name of the MIDI input driver as returned
1441     by the <xref target="LIST AVAILABLE_MIDI_INPUT_DRIVERS">
1442     "LIST AVAILABLE_MIDI_INPUT_DRIVERS"</xref> command.</t>
1443 schoenebeck 151 <t>Possible Answers:</t>
1444     <t>
1445     <list>
1446     <t>LinuxSampler will answer by sending a &lt;CRLF&gt; separated list.
1447     Each answer line begins with the information category name
1448     followed by a colon and then a space character &lt;SP&gt; and finally
1449     the info character string to that info category. At the moment
1450     the following information categories are defined:</t>
1451    
1452     <t>
1453     <list>
1454     <t>DESCRIPTION -
1455     <list>
1456     <t>arbitrary description text about the MIDI input driver</t>
1457     </list>
1458     </t>
1459     <t>VERSION -
1460     <list>
1461     <t>arbitrary character string regarding the driver's version</t>
1462     </list>
1463     </t>
1464     <t>PARAMETERS -
1465     <list>
1466     <t>comma separated list of all parameters available for the given MIDI input driver</t>
1467     </list>
1468     </t>
1469     </list>
1470     </t>
1471    
1472     <t>The mentioned fields above don't have to be in particular order.</t>
1473     </list>
1474     </t>
1475    
1476     <t>Example:</t>
1477    
1478     <t>
1479     <list>
1480 schoenebeck 222 <t>C: "GET MIDI_INPUT_DRIVER INFO ALSA"</t>
1481 schoenebeck 151 <t>S: "DESCRIPTION: Advanced Linux Sound Architecture"</t>
1482     <t>&nbsp;&nbsp;&nbsp;"VERSION: 1.0"</t>
1483 schoenebeck 222 <t>&nbsp;&nbsp;&nbsp;"PARAMETERS: DRIVER,ACTIVE"</t>
1484 schoenebeck 151 <t>&nbsp;&nbsp;&nbsp;"."</t>
1485     </list>
1486     </t>
1487     </section>
1488    
1489 schoenebeck 534 <section title="Getting information about specific MIDI input driver parameter" anchor="GET MIDI_INPUT_DRIVER_PARAMETER INFO">
1490 schoenebeck 151 <t>Use the following command to get detailed information about a specific parameter of a specific MIDI input driver:</t>
1491     <t>
1492     <list>
1493     <t>GET MIDI_INPUT_DRIVER_PARAMETER INFO &lt;midit&gt; &lt;param&gt; [&lt;deplist&gt;]</t>
1494     </list>
1495     </t>
1496    
1497 schoenebeck 561 <t>Where &lt;midit&gt; is the name of the MIDI input driver as returned
1498 schoenebeck 534 by the <xref target="LIST AVAILABLE_MIDI_INPUT_DRIVERS">
1499     "LIST AVAILABLE_MIDI_INPUT_DRIVERS"</xref> command, &lt;param&gt; a specific
1500 schoenebeck 151 parameter name for which information should be obtained (as returned by the
1501 schoenebeck 534 <xref target="GET MIDI_INPUT_DRIVER INFO">
1502     "GET MIDI_INPUT_DRIVER INFO"</xref> command) and &lt;deplist&gt; is an optional list
1503 schoenebeck 151 of parameters on which the sought parameter &lt;param&gt; depends on,
1504     &lt;deplist&gt; is a key-value pair list in form of "key1=val1 key2=val2 ...",
1505     where character string values are encapsulated into apostrophes ('). Arguments
1506     given with &lt;deplist&gt; which are not dependency parameters of &lt;param&gt;
1507     will be ignored, means the front-end application can simply put all parameters
1508     in &lt;deplist&gt; with the values selected by the user.</t>
1509    
1510     <t>Possible Answers:</t>
1511    
1512     <t>LinuxSampler will answer by sending a &lt;CRLF> separated list.
1513     Each answer line begins with the information category name
1514     followed by a colon and then a space character &lt;SP> and finally
1515     the info character string to that info category. There is
1516     information which is always returned, independent of the
1517     given driver parameter and there is optional information
1518     which is only shown dependent to given driver parameter. At
1519     the moment the following information categories are defined:</t>
1520    
1521     <t>
1522     <list>
1523     <t>TYPE -
1524     <list>
1525     <t>either "BOOL" for boolean value(s) or "INT" for integer
1526     value(s) or "FLOAT" for dotted number(s) or "STRING" for
1527     character string(s)
1528     (always returned, no matter which driver parameter)</t>
1529     </list>
1530     </t>
1531    
1532     <t>DESCRIPTION -
1533     <list>
1534     <t>arbitrary text describing the purpose of the parameter
1535     (always returned, no matter which driver parameter)</t>
1536     </list>
1537     </t>
1538    
1539     <t>MANDATORY -
1540     <list>
1541     <t>either true or false, defines if this parameter must be
1542     given when the device is to be created with the
1543 schoenebeck 534 <xref target="CREATE MIDI_INPUT_DEVICE">
1544     'CREATE MIDI_INPUT_DEVICE'</xref> command
1545 schoenebeck 151 (always returned, no matter which driver parameter)</t>
1546     </list>
1547     </t>
1548    
1549     <t>FIX -
1550     <list>
1551     <t>either true or false, if false then this parameter can
1552     be changed at any time, once the device is created by
1553 schoenebeck 534 the <xref target="CREATE MIDI_INPUT_DEVICE">
1554     'CREATE MIDI_INPUT_DEVICE'</xref> command
1555 schoenebeck 151 (always returned, no matter which driver parameter)</t>
1556     </list>
1557     </t>
1558    
1559     <t>MULTIPLICITY -
1560     <list>
1561     <t>either true or false, defines if this parameter allows
1562     only one value or a list of values, where true means
1563     multiple values and false only a single value allowed
1564     (always returned, no matter which driver parameter)</t>
1565     </list>
1566     </t>
1567    
1568     <t>DEPENDS -
1569     <list>
1570 schoenebeck 561 <t>comma separated list of parameters this parameter depends
1571 schoenebeck 151 on, means the values for fields 'DEFAULT', 'RANGE_MIN',
1572     'RANGE_MAX' and 'POSSIBILITIES' might depend on these
1573     listed parameters, for example assuming that an audio
1574 schoenebeck 222 driver (like the ALSA driver) offers parameters 'card'
1575 schoenebeck 151 and 'samplerate' then parameter 'samplerate' would
1576     depend on 'card' because the possible values for
1577     'samplerate' depends on the sound card which can be
1578     chosen by the 'card' parameter
1579     (optionally returned, dependent to driver parameter)</t>
1580     </list>
1581     </t>
1582    
1583     <t>DEFAULT -
1584     <list>
1585     <t>reflects the default value for this parameter which is
1586     used when the device is created and not explicitly
1587 schoenebeck 534 given with the <xref target="CREATE MIDI_INPUT_DEVICE">
1588     'CREATE MIDI_INPUT_DEVICE'</xref> command,
1589 schoenebeck 151 in case of MULTIPLCITY=true, this is a comma separated
1590     list, that's why character strings are encapsulated into
1591     apostrophes (')
1592     (optionally returned, dependent to driver parameter)</t>
1593     </list>
1594     </t>
1595    
1596     <t>RANGE_MIN -
1597     <list>
1598     <t>defines lower limit of the allowed value range for this
1599     parameter, can be an integer value as well as a dotted
1600     number, this parameter is often used in conjunction
1601     with RANGE_MAX, but may also appear without
1602     (optionally returned, dependent to driver parameter)</t>
1603     </list>
1604     </t>
1605    
1606     <t>RANGE_MAX -
1607     <list>
1608     <t>defines upper limit of the allowed value range for this
1609     parameter, can be an integer value as well as a dotted
1610     number, this parameter is often used in conjunction with
1611     RANGE_MIN, but may also appear without
1612     (optionally returned, dependent to driver parameter)</t>
1613     </list>
1614     </t>
1615    
1616 schoenebeck 494 <t>POSSIBILITIES -
1617 schoenebeck 151 <list>
1618     <t>comma separated list of possible values for this
1619     parameter, character strings are encapsulated into
1620     apostrophes
1621     (optionally returned, dependent to driver parameter)</t>
1622     </list>
1623     </t>
1624     </list>
1625     </t>
1626    
1627     <t>The mentioned fields above don't have to be in particular order.</t>
1628    
1629     <t>Example:</t>
1630     <t>
1631     <list>
1632 schoenebeck 222 <t>C: "GET MIDI_INPUT_DRIVER_PARAMETER INFO ALSA ACTIVE"</t>
1633 schoenebeck 151 <t>S: "DESCRIPTION: Whether device is enabled"</t>
1634     <t>&nbsp;&nbsp;&nbsp;"TYPE: BOOL"</t>
1635     <t>&nbsp;&nbsp;&nbsp;"MANDATORY: false"</t>
1636     <t>&nbsp;&nbsp;&nbsp;"FIX: false"</t>
1637     <t>&nbsp;&nbsp;&nbsp;"MULTIPLICITY: false"</t>
1638     <t>&nbsp;&nbsp;&nbsp;"DEFAULT: true"</t>
1639     <t>&nbsp;&nbsp;&nbsp;"."</t>
1640     </list>
1641     </t>
1642     </section>
1643    
1644 schoenebeck 534 <section title="Creating a MIDI input device" anchor="CREATE MIDI_INPUT_DEVICE">
1645 schoenebeck 151 <t>Use the following command to create a new MIDI input device for the desired MIDI input system:</t>
1646     <t>
1647     <list>
1648     <t>CREATE MIDI_INPUT_DEVICE &lt;midi-input-driver&gt; [&lt;param-list&gt;]</t>
1649     </list>
1650     </t>
1651    
1652 schoenebeck 571 <t>Where &lt;midi-input-driver&gt; should be replaced by the desired MIDI input system as returned
1653     by the <xref target="LIST AVAILABLE_MIDI_INPUT_DRIVERS">
1654     "LIST AVAILABLE_MIDI_INPUT_DRIVERS"</xref> command and &lt;param-list&gt; by an
1655 schoenebeck 151 optional list of driver specific parameters in form of "key1=val1 key2=val2 ...", where
1656     character string values should be encapsulated into apostrophes (').
1657     Note that there might be drivers which require parameter(s) to be
1658     given with this command. Use the previously described commands in
1659     this chapter to get that information.</t>
1660    
1661     <t>Possible Answers:</t>
1662     <t>
1663     <list>
1664     <t>"OK[&lt;device-id&gt;]" -
1665     <list>
1666     <t>in case the device was successfully created, where
1667     &lt;device-id&gt; is the numerical ID of the new device</t>
1668     </list>
1669     </t>
1670     <t>"WRN[&lt;device-id&gt;]:&lt;warning-code&gt;:&lt;warning-message&gt;" -
1671     <list>
1672     <t>in case the driver was loaded successfully, where
1673     &lt;device-id&gt; is the numerical ID of the new device, but
1674     there are noteworthy issue(s) related, providing an
1675     appropriate warning code and warning message</t>
1676     </list>
1677     </t>
1678     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
1679     <list>
1680     <t>in case it failed, providing an appropriate error code and error message</t>
1681     </list>
1682     </t>
1683     </list>
1684     </t>
1685     <t>Example:</t>
1686     <t>
1687     <list>
1688 schoenebeck 222 <t>C: "CREATE MIDI_INPUT_DEVICE ALSA"</t>
1689 schoenebeck 151 <t>S: "OK[0]"</t>
1690     </list>
1691     </t>
1692     </section>
1693    
1694 schoenebeck 534 <section title="Destroying a MIDI input device" anchor="DESTROY MIDI_INPUT_DEVICE">
1695 schoenebeck 151 <t>Use the following command to destroy a created MIDI input device:</t>
1696     <t>
1697     <list>
1698     <t>DESTROY MIDI_INPUT_DEVICE &lt;device-id&gt;</t>
1699     </list>
1700     </t>
1701 schoenebeck 571 <t>Where &lt;device-id&gt; should be replaced by the device's numerical ID as returned by the
1702     <xref target="CREATE MIDI_INPUT_DEVICE">"CREATE MIDI_INPUT_DEVICE"</xref>
1703     or <xref target="LIST MIDI_INPUT_DEVICES">"LIST MIDI_INPUT_DEVICES"</xref>
1704     command.</t>
1705 schoenebeck 151 <t>Possible Answers:</t>
1706     <t>
1707     <list>
1708     <t>"OK" -
1709     <list>
1710     <t>in case the device was successfully destroyed</t>
1711     </list>
1712     </t>
1713     <t>"WRN:&lt;warning-code&gt;:&lt;warning-message&gt;" -
1714     <list>
1715     <t>in case the device was destroyed, but there are noteworthy
1716     issue(s) related, providing an appropriate warning code and
1717     warning message</t>
1718     </list>
1719     </t>
1720     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
1721     <list>
1722     <t>in case it failed, providing an appropriate error code and error message</t>
1723     </list>
1724     </t>
1725     </list>
1726     </t>
1727     <t>Example:</t>
1728     <t>
1729     <list>
1730     <t>C: "DESTROY MIDI_INPUT_DEVICE 0"</t>
1731     <t>S: "OK"</t>
1732     </list>
1733     </t>
1734     </section>
1735    
1736 schoenebeck 534 <section title="Getting all created MIDI input device count" anchor="GET MIDI_INPUT_DEVICES">
1737 schoenebeck 151 <t>Use the following command to count all created MIDI input devices:</t>
1738     <t>
1739     <list>
1740     <t>GET MIDI_INPUT_DEVICES</t>
1741     </list>
1742     </t>
1743     <t>Possible Answers:</t>
1744     <t>
1745     <list>
1746     <t>LinuxSampler will answer by sending the current number of all
1747     MIDI input devices.</t>
1748     </list>
1749     </t>
1750     <t>Example:</t>
1751     <t>
1752     <list>
1753     <t>C: "GET MIDI_INPUT_DEVICES"</t>
1754     <t>S: "3"</t>
1755     </list>
1756     </t>
1757     </section>
1758    
1759    
1760 schoenebeck 534 <section title="Getting all created MIDI input device list" anchor="LIST MIDI_INPUT_DEVICES">
1761 schoenebeck 151 <t>Use the following command to list all created MIDI input devices:</t>
1762     <t>
1763     <list>
1764     <t>LIST MIDI_INPUT_DEVICES</t>
1765     </list>
1766     </t>
1767     <t>Possible Answers:</t>
1768     <t>
1769     <list>
1770     <t>LinuxSampler will answer by sending a comma separated list
1771     with the numerical Ids of all created MIDI input devices.</t>
1772     </list>
1773     </t>
1774     <t>Examples:</t>
1775     <t>
1776     <list>
1777     <t>C: "LIST MIDI_INPUT_DEVICES"</t>
1778     <t>S: "0,1,2"</t>
1779     </list>
1780     </t>
1781     <t>
1782     <list>
1783     <t>C: "LIST MIDI_INPUT_DEVICES"</t>
1784     <t>S: "1,3"</t>
1785     </list>
1786     </t>
1787     </section>
1788    
1789 schoenebeck 534 <section title="Getting current settings of a MIDI input device" anchor="GET MIDI_INPUT_DEVICE INFO">
1790 schoenebeck 151 <t>Use the following command to get current settings of a specific, created MIDI input device:</t>
1791     <t>
1792     <list>
1793     <t>GET MIDI_INPUT_DEVICE INFO &lt;device-id&gt;</t>
1794     </list>
1795     </t>
1796 schoenebeck 571 <t>Where &lt;device-id&gt; is the numerical ID of the MIDI input device as returned by the
1797     <xref target="CREATE MIDI_INPUT_DEVICE">"CREATE MIDI_INPUT_DEVICE"</xref>
1798     or <xref target="LIST MIDI_INPUT_DEVICES">"LIST MIDI_INPUT_DEVICES"</xref>
1799     command.</t>
1800 schoenebeck 151 <t>Possible Answers:</t>
1801     <t>
1802     <list>
1803     <t>LinuxSampler will answer by sending a &lt;CRLF&gt; separated list.
1804     Each answer line begins with the information category name
1805     followed by a colon and then a space character &lt;SP&gt; and finally
1806     the info character string to that info category. As some
1807     parameters might allow multiple values, character strings are
1808     encapsulated into apostrophes ('). At the moment the following
1809     information categories are defined (independent of driver):</t>
1810    
1811     <t>
1812     <list>
1813     <t>DRIVER -
1814     <list>
1815     <t>identifier of the used MIDI input driver, as e.g.
1816 schoenebeck 534 returned by the <xref target="LIST AVAILABLE_MIDI_INPUT_DRIVERS">
1817     "LIST AVAILABLE_MIDI_INPUT_DRIVERS"</xref>
1818 schoenebeck 151 command</t>
1819     </list>
1820     </t>
1821     </list>
1822     <list>
1823     <t>ACTIVE -
1824     <list>
1825     <t>either true or false, if false then the MIDI device is
1826     inactive and doesn't listen to any incoming MIDI events
1827     and thus doesn't forward them to connected sampler
1828     channels</t>
1829     </list>
1830     </t>
1831     </list>
1832     </t>
1833     </list>
1834     </t>
1835    
1836     <t>The mentioned fields above don't have to be in particular
1837     order. The fields above are only those fields which are
1838     returned by all MIDI input devices. Every MIDI input driver
1839     might have its own, additional driver specific parameters (see
1840 schoenebeck 534 <xref target="GET MIDI_INPUT_DRIVER INFO">
1841     "GET MIDI_INPUT_DRIVER INFO"</xref> command) which are also returned
1842 schoenebeck 151 by this command.</t>
1843    
1844     <t>Example:</t>
1845     <t>
1846     <list>
1847     <t>C: "GET MIDI_INPUT_DEVICE INFO 0"</t>
1848 schoenebeck 222 <t>S: "DRIVER: ALSA"</t>
1849     <t>&nbsp;&nbsp;&nbsp;"ACTIVE: true"</t>
1850 schoenebeck 151 <t>&nbsp;&nbsp;&nbsp;"."</t>
1851     </list>
1852     </t>
1853     </section>
1854    
1855 schoenebeck 534 <section title="Changing settings of MIDI input devices" anchor="SET MIDI_INPUT_DEVICE_PARAMETER">
1856 schoenebeck 151 <t>Use the following command to alter a specific setting of a created MIDI input device:</t>
1857     <t>
1858     <list>
1859     <t>SET MIDI_INPUT_DEVICE_PARAMETER &lt;device-id&gt; &lt;key&gt;=&lt;value&gt;</t>
1860     </list>
1861     </t>
1862    
1863     <t>Where &lt;device-id&gt; should be replaced by the numerical ID of the
1864 schoenebeck 571 MIDI input device as returned by the
1865     <xref target="CREATE MIDI_INPUT_DEVICE">"CREATE MIDI_INPUT_DEVICE"</xref>
1866     or <xref target="LIST MIDI_INPUT_DEVICES">"LIST MIDI_INPUT_DEVICES"</xref>
1867     command, &lt;key&gt; by the name of the parameter to change and
1868 schoenebeck 151 &lt;value&gt; by the new value for this parameter.</t>
1869    
1870     <t>Possible Answers:</t>
1871     <t>
1872     <list>
1873     <t>"OK" -
1874     <list>
1875     <t>in case setting was successfully changed</t>
1876     </list>
1877     </t>
1878     <t>"WRN:&lt;warning-code&gt;:&lt;warning-message&gt;" -
1879     <list>
1880     <t>in case setting was changed successfully, but there are
1881     noteworthy issue(s) related, providing an appropriate
1882     warning code and warning message</t>
1883     </list>
1884     </t>
1885     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
1886     <list>
1887     <t>in case it failed, providing an appropriate error code and error message</t>
1888     </list>
1889     </t>
1890     </list>
1891     </t>
1892     <t>Example:</t>
1893     <t>
1894     <list>
1895 schoenebeck 494 <t>C: "SET MIDI_INPUT_DEVICE_PARAMETER 0 ACTIVE=false"</t>
1896 schoenebeck 151 <t>S: "OK"</t>
1897     </list>
1898     </t>
1899     </section>
1900    
1901 schoenebeck 534 <section title="Getting information about a MIDI port" anchor="GET MIDI_INPUT_PORT INFO">
1902 schoenebeck 151 <t>Use the following command to get information about a MIDI port:</t>
1903     <t>
1904     <list>
1905     <t>GET MIDI_INPUT_PORT INFO &lt;device-id&gt; &lt;midi-port&gt;</t>
1906     </list>
1907     </t>
1908 schoenebeck 571 <t>Where &lt;device-id&gt; is the numerical ID of the MIDI input device as returned by the
1909     <xref target="CREATE MIDI_INPUT_DEVICE">"CREATE MIDI_INPUT_DEVICE"</xref>
1910     or <xref target="LIST MIDI_INPUT_DEVICES">"LIST MIDI_INPUT_DEVICES"</xref>
1911     command and &lt;midi-port&gt; the MIDI input port number.</t>
1912 schoenebeck 151 <t>Possible Answers:</t>
1913     <t>
1914     <list>
1915     <t>LinuxSampler will answer by sending a &lt;CRLF&gt; separated list.
1916     Each answer line begins with the information category name
1917     followed by a colon and then a space character &lt;SP&gt; and finally
1918     the info character string to that info category. At the moment
1919     the following information categories are defined:</t>
1920    
1921     <t>NAME -
1922     <list>
1923     <t>arbitrary character string naming the port</t>
1924     </list>
1925     </t>
1926     </list>
1927     </t>
1928    
1929     <t>The field above is only the one which is returned by all MIDI
1930     ports regardless of the MIDI driver and port. Every MIDI port
1931     might have its own, additional driver and port specific
1932     parameters.</t>
1933    
1934     <t>Example:</t>
1935     <t>
1936     <list>
1937     <t>C: "GET MIDI_INPUT_PORT INFO 0 0"</t>
1938 schoenebeck 222 <t>S: "NAME: 'Masterkeyboard'"</t>
1939     <t>&nbsp;&nbsp;&nbsp;"ALSA_SEQ_BINDINGS: '64:0'"</t>
1940 schoenebeck 151 <t>&nbsp;&nbsp;&nbsp;"."</t>
1941     </list>
1942     </t>
1943     </section>
1944    
1945 schoenebeck 534 <section title="Getting information about specific MIDI port parameter" anchor="GET MIDI_INPUT_PORT_PARAMETER INFO">
1946 schoenebeck 151 <t>Use the following command to get detailed information about specific MIDI port parameter:</t>
1947     <t>
1948     <list>
1949     <t>GET MIDI_INPUT_PORT_PARAMETER INFO &lt;dev-id&gt; &lt;port&gt; &lt;param&gt;</t>
1950     </list>
1951     </t>
1952    
1953 schoenebeck 571 <t>Where &lt;dev-id&gt; is the numerical ID of the MIDI input device as returned by the
1954     <xref target="CREATE MIDI_INPUT_DEVICE">"CREATE MIDI_INPUT_DEVICE"</xref>
1955     or <xref target="LIST MIDI_INPUT_DEVICES">"LIST MIDI_INPUT_DEVICES"</xref>
1956     command, &lt;port&gt; the MIDI port number and
1957 schoenebeck 151 &lt;param&gt; a specific port parameter name for which information should be
1958 schoenebeck 534 obtained (as returned by the <xref target="GET MIDI_INPUT_PORT INFO">
1959     "GET MIDI_INPUT_PORT INFO"</xref> command).</t>
1960 schoenebeck 151
1961     <t>Possible Answers:</t>
1962     <t>
1963     <list>
1964     <t>LinuxSampler will answer by sending a &lt;CRLF&gt; separated list.
1965     Each answer line begins with the information category name
1966     followed by a colon and then a space character &lt;SP&gt; and finally
1967     the info character string to that info category. There is
1968     information which is always returned, independently of the
1969     given channel parameter and there is optional information
1970     which are only shown dependently to the given MIDI port. At the
1971     moment the following information categories are defined:</t>
1972    
1973     <t>TYPE -
1974     <list>
1975     <t>either "BOOL" for boolean value(s) or "INT" for integer
1976     value(s) or "FLOAT" for dotted number(s) or "STRING" for
1977     character string(s)
1978     (always returned)</t>
1979     </list>
1980     </t>
1981     <t>DESCRIPTION -
1982     <list>
1983     <t>arbitrary text describing the purpose of the parameter
1984     (always returned)</t>
1985     </list>
1986     </t>
1987     <t>FIX -
1988     <list>
1989     <t>either true or false, if true then this parameter is
1990     read only, thus cannot be altered
1991     (always returned)</t>
1992     </list>
1993     </t>
1994     <t>MULTIPLICITY -
1995     <list>
1996     <t>either true or false, defines if this parameter allows
1997     only one value or a list of values, where true means
1998     multiple values and false only a single value allowed
1999     (always returned)</t>
2000     </list>
2001     </t>
2002     <t>RANGE_MIN -
2003     <list>
2004     <t>defines lower limit of the allowed value range for this
2005     parameter, can be an integer value as well as a dotted
2006     number, this parameter is usually used in conjunction
2007     with 'RANGE_MAX' but may also appear without
2008     (optionally returned, dependent to driver and port
2009     parameter)</t>
2010     </list>
2011     </t>
2012     <t>RANGE_MAX -
2013     <list>
2014     <t>defines upper limit of the allowed value range for this
2015     parameter, can be an integer value as well as a dotted
2016     number, this parameter is usually used in conjunction
2017     with 'RANGE_MIN' but may also appear without
2018     (optionally returned, dependent to driver and port
2019     parameter)</t>
2020     </list>
2021     </t>
2022 schoenebeck 494 <t>POSSIBILITIES -
2023 schoenebeck 151 <list>
2024     <t>comma separated list of possible values for this
2025     parameter, character strings are encapsulated into
2026     apostrophes
2027     (optionally returned, dependent to device and port
2028     parameter)</t>
2029     </list>
2030     </t>
2031     </list>
2032     </t>
2033    
2034     <t>The mentioned fields above don't have to be in particular order.</t>
2035    
2036     <t>Example:</t>
2037     <t>
2038     <list>
2039 schoenebeck 222 <t>C: "GET MIDI_INPUT_PORT_PARAMETER INFO 0 0 ALSA_SEQ_BINDINGS"</t>
2040     <t>S: "DESCRIPTION: bindings to other ALSA sequencer clients"</t>
2041     <t>&nbsp;&nbsp;&nbsp;"TYPE: STRING"</t>
2042 schoenebeck 151 <t>&nbsp;&nbsp;&nbsp;"FIX: false"</t>
2043     <t>&nbsp;&nbsp;&nbsp;"MULTIPLICITY: true"</t>
2044 schoenebeck 494 <t>&nbsp;&nbsp;&nbsp;"POSSIBILITIES: '64:0','68:0','68:1'"</t>
2045 schoenebeck 151 <t>&nbsp;&nbsp;&nbsp;"."</t>
2046     </list>
2047     </t>
2048     </section>
2049    
2050 schoenebeck 534 <section title="Changing settings of MIDI input ports" anchor="SET MIDI_INPUT_PORT_PARAMETER">
2051 schoenebeck 151 <t>Use the following command to alter a specific setting of a MIDI input port:</t>
2052     <t>
2053     <list>
2054 schoenebeck 221 <t>SET MIDI_INPUT_PORT_PARAMETER &lt;device-id&gt; &lt;port&gt; &lt;key&gt;=&lt;value&gt;</t>
2055 schoenebeck 151 </list>
2056     </t>
2057    
2058     <t>Where &lt;device-id&gt; should be replaced by the numerical ID of the
2059 schoenebeck 571 MIDI device as returned by the
2060     <xref target="CREATE MIDI_INPUT_DEVICE">"CREATE MIDI_INPUT_DEVICE"</xref>
2061     or <xref target="LIST MIDI_INPUT_DEVICES">"LIST MIDI_INPUT_DEVICES"</xref>
2062     command, &lt;port&gt; by the MIDI port number, &lt;key&gt; by the name of
2063 schoenebeck 151 the parameter to change and &lt;value&gt; by the new value for this
2064     parameter.</t>
2065    
2066     <t>Possible Answers:</t>
2067     <t>
2068     <list>
2069     <t>"OK" -
2070     <list>
2071     <t>in case setting was successfully changed</t>
2072     </list>
2073     </t>
2074     <t>"WRN:&lt;warning-code&gt;:&lt;warning-message&gt;" -
2075     <list>
2076     <t>in case setting was changed successfully, but there are
2077     noteworthy issue(s) related, providing an appropriate
2078     warning code and warning message</t>
2079     </list>
2080     </t>
2081     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
2082     <list>
2083     <t>in case it failed, providing an appropriate error code and error message</t>
2084     </list>
2085     </t>
2086     </list>
2087     </t>
2088     <t>Example:</t>
2089     <t>
2090     <list>
2091     <t></t>
2092     </list>
2093     </t>
2094     </section>
2095     </section>
2096    
2097     <section title="Configuring sampler channels">
2098 schoenebeck 571 <t>The following commands describe how to add and remove sampler channels, associate a
2099     sampler channel with a sampler engine, load instruments and connect sampler channels to
2100     MIDI and audio devices.</t>
2101 schoenebeck 151
2102 schoenebeck 534 <section title="Loading an instrument" anchor="LOAD INSTRUMENT">
2103 schoenebeck 151 <t>An instrument file can be loaded and assigned to a sampler channel by one of the following commands:</t>
2104     <t>
2105     <list>
2106     <t>LOAD INSTRUMENT [NON_MODAL] '&lt;filename&gt;' &lt;instr-index&gt; &lt;sampler-channel&gt;</t>
2107     </list>
2108     </t>
2109    
2110     <t>Where &lt;filename&gt; is the name of the instrument file on the
2111     LinuxSampler instance's host system, &lt;instr-index&gt; the index of the
2112     instrument in the instrument file and &lt;sampler-channel> is the
2113     number of the sampler channel the instrument should be assigned to.
2114     Each sampler channel can only have one instrument.</t>
2115    
2116     <t>The difference between regular and NON_MODAL versions of the command
2117     is that the regular command returns OK only after the instrument has been
2118     fully loaded and the channel is ready to be used while NON_MODAL version
2119     returns immediately and a background process is launched to load the instrument
2120 schoenebeck 534 on the channel. The <xref target="GET CHANNEL INFO">GET CHANNEL INFO</xref>
2121     command can be used to obtain loading
2122 schoenebeck 151 progress from INSTRUMENT_STATUS field. LOAD command will perform sanity checks
2123     such as making sure that the file could be read and it is of a proper format
2124     and SHOULD return ERR and SHOULD not launch the background process should any
2125     errors be detected at that point.</t>
2126    
2127     <t>Possible Answers:</t>
2128     <t>
2129     <list>
2130     <t>"OK" -
2131     <list>
2132     <t>in case the instrument was successfully loaded</t>
2133     </list>
2134     </t>
2135     <t>"WRN:&lt;warning-code&gt;:&lt;warning-message&gt;" -
2136     <list>
2137     <t>in case the instrument was loaded successfully, but there
2138     are noteworthy issue(s) related (e.g. Engine doesn't support
2139     one or more patch parameters provided by the loaded
2140     instrument file), providing an appropriate warning code and
2141     warning message</t>
2142     </list>
2143     </t>
2144     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
2145     <list>
2146     <t>in case it failed, providing an appropriate error code and error message</t>
2147     </list>
2148     </t>
2149     </list>
2150     </t>
2151     <t>Example:</t>
2152     <t>
2153     <list>
2154     <t></t>
2155     </list>
2156     </t>
2157     </section>
2158    
2159 schoenebeck 534 <section title="Loading a sampler engine" anchor="LOAD ENGINE">
2160 schoenebeck 571 <t>A sampler engine type can be associated to a specific sampler
2161 schoenebeck 151 channel by the following command:</t>
2162     <t>
2163     <list>
2164     <t>LOAD ENGINE &lt;engine-name&gt; &lt;sampler-channel&gt;</t>
2165     </list>
2166     </t>
2167    
2168 schoenebeck 494 <t>Where &lt;engine-name&gt; is an engine name as obtained by the
2169 schoenebeck 534 <xref target="LIST AVAILABLE_ENGINES">
2170 schoenebeck 571 "LIST AVAILABLE_ENGINES"</xref> command and &lt;sampler-channel&gt;
2171     the sampler channel as returned by the
2172     <xref target="ADD CHANNEL">"ADD CHANNEL"</xref> or
2173     <xref target="LIST CHANNELS">"LIST CHANNELS"</xref> command where
2174     the engine type should be assigned to. This command should be issued
2175     after adding a new sampler channel and before any other control
2176     commands on the new sampler channel. It can also be used to change
2177     the engine type of a sampler channel. This command has (currently) no
2178     way to define or force if a new engine instance should be created and
2179     assigned to the given sampler channel or if an already existing
2180     instance of that engine type, shared with other sampler channels,
2181     should be used.</t>
2182 schoenebeck 151
2183     <t>Possible Answers:</t>
2184     <t>
2185     <list>
2186     <t>"OK" -
2187     <list>
2188     <t>in case the engine was successfully deployed</t>
2189     </list>
2190     </t>
2191     <t>"WRN:&lt;warning-code&gt;:&lt;warning-message&gt;" -
2192     <list>
2193     <t>in case the engine was deployed successfully, but there
2194     are noteworthy issue(s) related, providing an appropriate
2195     warning code and warning message</t>
2196     </list>
2197     </t>
2198     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
2199     <list>
2200     <t>in case it failed, providing an appropriate error code and
2201     error message</t>
2202     </list>
2203     </t>
2204     </list>
2205     </t>
2206     <t>Example:</t>
2207     <t>
2208     <list>
2209     <t></t>
2210     </list>
2211     </t>
2212     </section>
2213    
2214 schoenebeck 534 <section title="Getting all created sampler channel count" anchor="GET CHANNELS">
2215 schoenebeck 151 <t>The number of sampler channels can change on runtime. To get the
2216     current amount of sampler channels, the front-end can send the
2217     following command:</t>
2218     <t>
2219     <list>
2220     <t>GET CHANNELS</t>
2221     </list>
2222     </t>
2223     <t>Possible Answers:</t>
2224     <t>
2225     <list>
2226     <t>LinuxSampler will answer by returning the current number of sampler channels.</t>
2227     </list>
2228     </t>
2229     <t>Example:</t>
2230     <t>
2231     <list>
2232     <t>C: "GET CHANNELS"</t>
2233     <t>S: "12"</t>
2234     </list>
2235     </t>
2236     </section>
2237    
2238 schoenebeck 534 <section title="Getting all created sampler channel list" anchor="LIST CHANNELS">
2239 schoenebeck 151 <t>The number of sampler channels can change on runtime. To get the
2240     current list of sampler channels, the front-end can send the
2241     following command:</t>
2242     <t>
2243     <list>
2244     <t>LIST CHANNELS</t>
2245     </list>
2246     </t>
2247     <t>Possible Answers:</t>
2248     <t>
2249     <list>
2250     <t>LinuxSampler will answer by returning a comma separated list
2251     with all sampler channels numerical IDs.</t>
2252     </list>
2253     </t>
2254     <t>Example:</t>
2255     <t>
2256     <list>
2257     <t>C: "LIST CHANNELS"</t>
2258     <t>S: "0,1,2,3,4,5,6,9,10,11,15,20"</t>
2259     </list>
2260     </t>
2261     </section>
2262    
2263 schoenebeck 534 <section title="Adding a new sampler channel" anchor="ADD CHANNEL">
2264 schoenebeck 151 <t>A new sampler channel can be added to the end of the sampler
2265     channel list by sending the following command:</t>
2266     <t>
2267     <list>
2268     <t>ADD CHANNEL</t>
2269     </list>
2270     </t>
2271     <t>This will increment the sampler channel count by one and the new
2272     sampler channel will be appended to the end of the sampler channel
2273     list. The front-end should send the respective, related commands
2274     right after to e.g. load an engine, load an instrument and setting
2275     input, output method and eventually other commands to initialize
2276     the new channel. The front-end should use the sampler channel
2277     returned by the answer of this command to perform the previously
2278     recommended commands, to avoid race conditions e.g. with other
2279     front-ends that might also have sent an "ADD CHANNEL" command.</t>
2280     <t>Possible Answers:</t>
2281     <t>
2282     <list>
2283     <t>"OK[&lt;sampler-channel&gt;]" -
2284     <list>
2285     <t>in case a new sampler channel could be added, where
2286     &lt;sampler-channel&gt; reflects the channel number of the new
2287 schoenebeck 561 created sampler channel which should be used to set up
2288     the sampler channel by sending subsequent initialization
2289 schoenebeck 151 commands</t>
2290     </list>
2291     </t>
2292     <t>"WRN:&lt;warning-code&gt;:&lt;warning-message&gt;" -
2293     <list>
2294     <t>in case a new channel was added successfully, but there are
2295     noteworthy issue(s) related, providing an appropriate
2296     warning code and warning message</t>
2297     </list>
2298     </t>
2299     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
2300     <list>
2301     <t>in case it failed, providing an appropriate error code and
2302     error message</t>
2303     </list>
2304     </t>
2305     </list>
2306     </t>
2307     <t>Example:</t>
2308     <t>
2309     <list>
2310     <t></t>
2311     </list>
2312     </t>
2313     </section>
2314    
2315 schoenebeck 534 <section title="Removing a sampler channel" anchor="REMOVE CHANNEL">
2316 schoenebeck 151 <t>A sampler channel can be removed by sending the following command:</t>
2317     <t>
2318     <list>
2319     <t>REMOVE CHANNEL &lt;sampler-channel&gt;</t>
2320     </list>
2321     </t>
2322    
2323 schoenebeck 561 <t>Where &lt;sampler-channel&gt; should be replaced by the
2324     number of the sampler channel as given by the
2325     <xref target="ADD CHANNEL">"ADD CHANNEL"</xref>
2326     or <xref target="LIST CHANNELS">"LIST CHANNELS"</xref>
2327     command. The channel numbers of all subsequent sampler channels
2328     remain the same.</t>
2329 schoenebeck 151
2330     <t>Possible Answers:</t>
2331     <t>
2332     <list>
2333     <t>"OK" -
2334     <list>
2335     <t>in case the given sampler channel could be removed</t>
2336     </list>
2337     </t>
2338     <t>"WRN:&lt;warning-code&gt;:&lt;warning-message&gt;" -
2339     <list>
2340     <t>in case the given channel was removed, but there are
2341     noteworthy issue(s) related, providing an appropriate
2342     warning code and warning message</t>
2343     </list>
2344     </t>
2345     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
2346     <list>
2347     <t>in case it failed, providing an appropriate error code and
2348     error message</t>
2349     </list>
2350     </t>
2351     </list>
2352     </t>
2353     <t>Example:</t>
2354     <t>
2355     <list>
2356     <t></t>
2357     </list>
2358     </t>
2359     </section>
2360    
2361 schoenebeck 534 <section title="Getting amount of available engines" anchor="GET AVAILABLE_ENGINES">
2362     <t>The front-end can ask for the number of available engines by sending the following command:</t>
2363 schoenebeck 151 <t>
2364     <list>
2365     <t>GET AVAILABLE_ENGINES</t>
2366     </list>
2367     </t>
2368     <t>Possible Answers:</t>
2369     <t>
2370     <list>
2371 schoenebeck 534 <t>LinuxSampler will answer by sending the number of available engines.</t>
2372     </list>
2373     </t>
2374     <t>Example:</t>
2375     <t>
2376     <list>
2377     <t>C: "GET AVAILABLE_ENGINES"</t>
2378     <t>S: "4"</t>
2379     </list>
2380     </t>
2381     </section>
2382    
2383     <section title="Getting all available engines" anchor="LIST AVAILABLE_ENGINES">
2384     <t>The front-end can ask for a list of all available engines by sending the following command:</t>
2385     <t>
2386     <list>
2387     <t>LIST AVAILABLE_ENGINES</t>
2388     </list>
2389     </t>
2390     <t>Possible Answers:</t>
2391     <t>
2392     <list>
2393 schoenebeck 561 <t>LinuxSampler will answer by sending a comma separated list
2394     of the engines' names encapsulated into apostrophes (').
2395     Engine names can consist of lower and upper cases,
2396     digits and underlines ("_" character).</t>
2397 schoenebeck 151 </list>
2398     </t>
2399     <t>Example:</t>
2400     <t>
2401     <list>
2402 schoenebeck 534 <t>C: "LIST AVAILABLE_ENGINES"</t>
2403 schoenebeck 561 <t>S: "'GigEngine','AkaiEngine','DLSEngine','JoesCustomEngine'"</t>
2404 schoenebeck 151 </list>
2405     </t>
2406     </section>
2407    
2408 schoenebeck 534 <section title="Getting information about an engine" anchor="GET ENGINE INFO">
2409 schoenebeck 151 <t>The front-end can ask for information about a specific engine by
2410     sending the following command:</t>
2411     <t>
2412     <list>
2413     <t>GET ENGINE INFO &lt;engine-name&gt;</t>
2414     </list>
2415     </t>
2416 schoenebeck 494 <t>Where &lt;engine-name&gt; is an engine name as obtained by the
2417 schoenebeck 534 <xref target="LIST AVAILABLE_ENGINES">
2418     "LIST AVAILABLE_ENGINES"</xref> command.</t>
2419 schoenebeck 151 <t>Possible Answers:</t>
2420     <t>
2421     <list>
2422 schoenebeck 494 <t>LinuxSampler will answer by sending a &lt;CRLF&gt; separated list.
2423 schoenebeck 151 Each answer line begins with the information category name
2424     followed by a colon and then a space character &lt;SP&gt; and finally
2425     the info character string to that info category. At the moment
2426     the following categories are defined:</t>
2427    
2428     <t>
2429     <list>
2430     <t>DESCRIPTION -
2431     <list>
2432     <t>arbitrary description text about the engine</t>
2433     </list>
2434     </t>
2435     <t>VERSION -
2436     <list>
2437     <t>arbitrary character string regarding the engine's version</t>
2438     </list>
2439     </t>
2440     </list>
2441     </t>
2442     </list>
2443     </t>
2444    
2445     <t>The mentioned fields above don't have to be in particular order.</t>
2446    
2447     <t>Example:</t>
2448     <t>
2449     <list>
2450     <t>C: "GET ENGINE INFO JoesCustomEngine"</t>
2451     <t>S: "DESCRIPTION: this is Joe's custom sampler engine"</t>
2452     <t>&nbsp;&nbsp;&nbsp;"VERSION: testing-1.0"</t>
2453     <t>&nbsp;&nbsp;&nbsp;"."</t>
2454     </list>
2455     </t>
2456     </section>
2457    
2458 schoenebeck 534 <section title="Getting sampler channel information" anchor="GET CHANNEL INFO">
2459 schoenebeck 151 <t>The front-end can ask for the current settings of a sampler channel
2460     by sending the following command:</t>
2461     <t>
2462     <list>
2463     <t>GET CHANNEL INFO &lt;sampler-channel&gt;</t>
2464     </list>
2465     </t>
2466 schoenebeck 571 <t>Where &lt;sampler-channel&gt; is the sampler channel number the front-end is interested in
2467     as returned by the <xref target="ADD CHANNEL">"ADD CHANNEL"</xref>
2468     or <xref target="LIST CHANNELS">"LIST CHANNELS"</xref> command.</t>
2469 schoenebeck 151 <t>Possible Answers:</t>
2470     <t>
2471     <list>
2472     <t>LinuxSampler will answer by sending a &lt;CRLF&gt; separated list.
2473     Each answer line begins with the settings category name
2474     followed by a colon and then a space character &lt;SP&gt; and finally
2475     the info character string to that setting category. At the
2476     moment the following categories are defined:</t>
2477    
2478     <t>
2479     <list>
2480     <t>ENGINE_NAME -
2481     <list>
2482 schoenebeck 571 <t>name of the engine that is associated with the sampler
2483     channel, "NONE" if there's no engine associated yet for
2484 schoenebeck 151 this sampler channel</t>
2485     </list>
2486     </t>
2487     <t>AUDIO_OUTPUT_DEVICE -
2488     <list>
2489     <t>numerical ID of the audio output device which is
2490     currently connected to this sampler channel to output
2491     the audio signal, "NONE" if there's no device
2492     connected to this sampler channel</t>
2493     </list>
2494     </t>
2495     <t>AUDIO_OUTPUT_CHANNELS -
2496     <list>
2497     <t>number of output channels the sampler channel offers
2498     (dependent to used sampler engine and loaded instrument)</t>
2499     </list>
2500     </t>
2501     <t>AUDIO_OUTPUT_ROUTING -
2502     <list>
2503     <t>comma separated list which reflects to which audio
2504     channel of the selected audio output device each
2505     sampler output channel is routed to, e.g. "0,3" would
2506     mean the engine's output channel 0 is routed to channel
2507     0 of the audio output device and the engine's output
2508     channel 1 is routed to the channel 3 of the audio
2509     output device</t>
2510     </list>
2511     </t>
2512     <t>INSTRUMENT_FILE -
2513     <list>
2514     <t>the file name of the loaded instrument, "NONE" if
2515     there's no instrument yet loaded for this sampler
2516     channel</t>
2517     </list>
2518     </t>
2519     <t>INSTRUMENT_NR -
2520     <list>
2521     <t>the instrument index number of the loaded instrument</t>
2522     </list>
2523     </t>
2524 senkov 377 <t>INSTRUMENT_NAME -
2525     <list>
2526     <t>the instrument name of the loaded instrument</t>
2527     </list>
2528     </t>
2529 schoenebeck 151 <t>INSTRUMENT_STATUS -
2530     <list>
2531     <t>integer values 0 to 100 indicating loading progress percentage for the instrument. Negative
2532     value indicates a loading exception. Value of 100 indicates that the instrument is fully
2533     loaded.</t>
2534     </list>
2535     </t>
2536     <t>MIDI_INPUT_DEVICE -
2537     <list>
2538     <t>numerical ID of the MIDI input device which is
2539     currently connected to this sampler channel to deliver
2540     MIDI input commands, "NONE" if there's no device
2541     connected to this sampler channel</t>
2542     </list>
2543     </t>
2544     <t>MIDI_INPUT_PORT -
2545     <list>
2546     <t>port number of the MIDI input device</t>
2547     </list>
2548     </t>
2549     <t>MIDI_INPUT_CHANNEL -
2550     <list>
2551     <t>the MIDI input channel number this sampler channel
2552     should listen to or "ALL" to listen on all MIDI channels</t>
2553     </list>
2554     </t>
2555     <t>VOLUME -
2556     <list>
2557     <t>optionally dotted number for the channel volume factor
2558 schoenebeck 1026 (where a value &lt; 1.0 means attenuation and a value >
2559 schoenebeck 151 1.0 means amplification)</t>
2560     </list>
2561     </t>
2562 iliev 706 <t>MUTE -
2563     <list>
2564     <t>Determines whether the channel is muted, "true" if the
2565 schoenebeck 709 channel is muted, "false" if the channel is not muted, and
2566     "MUTED_BY_SOLO" if the channel is muted because of the
2567     presence of a solo channel and will be unmuted when
2568 iliev 706 there are no solo channels left</t>
2569     </list>
2570     </t>
2571     <t>SOLO -
2572     <list>
2573     <t>Determines whether this is a solo channel, "true" if
2574     the channel is a solo channel; "false" otherwise</t>
2575     </list>
2576     </t>
2577 schoenebeck 973 <t>MIDI_INSTRUMENT_MAP -
2578     <list>
2579     <t>Determines to which MIDI instrument map this sampler
2580     channel is assigned to. Read chapter
2581     <xref target="SET CHANNEL MIDI_INSTRUMENT_MAP">"SET CHANNEL MIDI_INSTRUMENT_MAP"</xref>
2582     for a list of possible values.</t>
2583     </list>
2584     </t>
2585 schoenebeck 151 </list>
2586     </t>
2587     </list>
2588     </t>
2589     <t>The mentioned fields above don't have to be in particular order.</t>
2590    
2591     <t>Example:</t>
2592     <t>
2593     <list>
2594     <t>C: "GET CHANNEL INFO 34"</t>
2595     <t>S: "ENGINE_NAME: GigEngine"</t>
2596     <t>&nbsp;&nbsp;&nbsp;"VOLUME: 1.0"</t>
2597     <t>&nbsp;&nbsp;&nbsp;"AUDIO_OUTPUT_DEVICE: 0"</t>
2598     <t>&nbsp;&nbsp;&nbsp;"AUDIO_OUTPUT_CHANNELS: 2"</t>
2599     <t>&nbsp;&nbsp;&nbsp;"AUDIO_OUTPUT_ROUTING: 0,1"</t>
2600     <t>&nbsp;&nbsp;&nbsp;"INSTRUMENT_FILE: /home/joe/FazioliPiano.gig"</t>
2601     <t>&nbsp;&nbsp;&nbsp;"INSTRUMENT_NR: 0"</t>
2602 senkov 377 <t>&nbsp;&nbsp;&nbsp;"INSTRUMENT_NAME: Fazioli Piano"</t>
2603 schoenebeck 151 <t>&nbsp;&nbsp;&nbsp;"INSTRUMENT_STATUS: 100"</t>
2604     <t>&nbsp;&nbsp;&nbsp;"MIDI_INPUT_DEVICE: 0"</t>
2605     <t>&nbsp;&nbsp;&nbsp;"MIDI_INPUT_PORT: 0"</t>
2606     <t>&nbsp;&nbsp;&nbsp;"MIDI_INPUT_CHANNEL: 5"</t>
2607 schoenebeck 973 <t>&nbsp;&nbsp;&nbsp;"VOLUME: 1.0"</t>
2608     <t>&nbsp;&nbsp;&nbsp;"MUTE: false"</t>
2609     <t>&nbsp;&nbsp;&nbsp;"SOLO: false"</t>
2610     <t>&nbsp;&nbsp;&nbsp;"MIDI_INSTRUMENT_MAP: NONE"</t>
2611 schoenebeck 151 <t>&nbsp;&nbsp;&nbsp;"."</t>
2612     </list>
2613     </t>
2614     </section>
2615    
2616 schoenebeck 534 <section title="Current number of active voices" anchor="GET CHANNEL VOICE_COUNT">
2617 schoenebeck 151 <t>The front-end can ask for the current number of active voices on a
2618     sampler channel by sending the following command:</t>
2619     <t>
2620     <list>
2621 schoenebeck 206 <t>GET CHANNEL VOICE_COUNT &lt;sampler-channel&gt;</t>
2622 schoenebeck 151 </list>
2623     </t>
2624 schoenebeck 571 <t>Where &lt;sampler-channel&gt; is the sampler channel number the front-end is interested in
2625     as returned by the <xref target="ADD CHANNEL">"ADD CHANNEL"</xref>
2626     or <xref target="LIST CHANNELS">"LIST CHANNELS"</xref> command.</t>
2627 schoenebeck 206
2628 schoenebeck 151 <t>Possible Answers:</t>
2629     <t>
2630     <list>
2631     <t>LinuxSampler will answer by returning the number of active
2632     voices on that channel.</t>
2633     </list>
2634     </t>
2635     <t>Example:</t>
2636     <t>
2637     <list>
2638     <t></t>
2639     </list>
2640     </t>
2641     </section>
2642    
2643 schoenebeck 534 <section title="Current number of active disk streams" anchor="GET CHANNEL STREAM_COUNT">
2644 schoenebeck 151 <t>The front-end can ask for the current number of active disk streams
2645     on a sampler channel by sending the following command:</t>
2646     <t>
2647     <list>
2648     <t>GET CHANNEL STREAM_COUNT &lt;sampler-channel&gt;</t>
2649     </list>
2650     </t>
2651 schoenebeck 571 <t>Where &lt;sampler-channel&gt; is the sampler channel number the front-end is interested in
2652     as returned by the <xref target="ADD CHANNEL">"ADD CHANNEL"</xref>
2653     or <xref target="LIST CHANNELS">"LIST CHANNELS"</xref> command.</t>
2654 schoenebeck 151
2655     <t>Possible Answers:</t>
2656     <t>
2657     <list>
2658     <t>LinuxSampler will answer by returning the number of active
2659     disk streams on that channel in case the engine supports disk
2660     streaming, if the engine doesn't support disk streaming it will
2661     return "NA" for not available.</t>
2662     </list>
2663     </t>
2664     <t>Example:</t>
2665     <t>
2666     <list>
2667     <t></t>
2668     </list>
2669     </t>
2670     </section>
2671    
2672 schoenebeck 534 <section title="Current fill state of disk stream buffers" anchor="GET CHANNEL BUFFER_FILL">
2673 schoenebeck 151 <t>The front-end can ask for the current fill state of all disk streams
2674     on a sampler channel by sending the following command:</t>
2675     <t>
2676     <list>
2677     <t>GET CHANNEL BUFFER_FILL BYTES &lt;sampler-channel&gt;</t>
2678     </list>
2679     </t>
2680     <t>to get the fill state in bytes or</t>
2681     <t>
2682     <list>
2683     <t>GET CHANNEL BUFFER_FILL PERCENTAGE &lt;sampler-channel&gt;</t>
2684     </list>
2685     </t>
2686     <t>to get the fill state in percent, where &lt;sampler-channel&gt; is the
2687 schoenebeck 571 sampler channel number the front-end is interested in
2688     as returned by the <xref target="ADD CHANNEL">"ADD CHANNEL"</xref>
2689     or <xref target="LIST CHANNELS">"LIST CHANNELS"</xref> command.</t>
2690 schoenebeck 151
2691     <t>Possible Answers:</t>
2692     <t>
2693     <list>
2694     <t>LinuxSampler will either answer by returning a comma separated
2695     string with the fill state of all disk stream buffers on that
2696     channel or an empty line if there are no active disk streams or
2697     "NA" for *not available* in case the engine which is deployed
2698     doesn't support disk streaming. Each entry in the answer list
2699     will begin with the stream's ID in brackets followed by the
2700     numerical representation of the fill size (either in bytes or
2701     percentage). Note: due to efficiency reasons the fill states in
2702     the response are not in particular order, thus the front-end has
2703     to sort them by itself if necessary.</t>
2704     </list>
2705     </t>
2706     <t>Examples:</t>
2707     <t>
2708     <list>
2709     <t>C: "GET CHANNEL BUFFER_FILL BYTES 4"</t>
2710     <t>S: "[115]420500,[116]510300,[75]110000,[120]230700"</t>
2711     </list>
2712    
2713     <list>
2714     <t>C: "GET CHANNEL BUFFER_FILL PERCENTAGE 4"</t>
2715     <t>S: "[115]90%,[116]98%,[75]40%,[120]62%"</t>
2716     </list>
2717    
2718     <list>
2719     <t>C: "GET CHANNEL BUFFER_FILL PERCENTAGE 4"</t>
2720     <t>S: ""</t>
2721     </list>
2722     </t>
2723     </section>
2724    
2725 schoenebeck 534 <section title="Setting audio output device" anchor="SET CHANNEL AUDIO_OUTPUT_DEVICE">
2726 schoenebeck 151 <t>The front-end can set the audio output device on a specific sampler
2727     channel by sending the following command:</t>
2728     <t>
2729     <list>
2730     <t>SET CHANNEL AUDIO_OUTPUT_DEVICE &lt;sampler-channel&gt; &lt;audio-device-id&gt;</t>
2731     </list>
2732     </t>
2733 schoenebeck 571 <t>Where &lt;sampler-channel&gt; is the respective sampler channel
2734     number as returned by the <xref target="ADD CHANNEL">"ADD CHANNEL"</xref>
2735     or <xref target="LIST CHANNELS">"LIST CHANNELS"</xref> command and
2736     &lt;audio-device-id&gt; is the numerical ID of the audio output device as given by the
2737     <xref target="CREATE AUDIO_OUTPUT_DEVICE">"CREATE AUDIO_OUTPUT_DEVICE"</xref>
2738     or <xref target="LIST AUDIO_OUTPUT_DEVICES">"LIST AUDIO_OUTPUT_DEVICES"</xref>
2739     command.</t>
2740 schoenebeck 151
2741     <t>Possible Answers:</t>
2742     <t>
2743     <list>
2744     <t>"OK" -
2745     <list>
2746     <t>on success</t>
2747     </list>
2748     </t>
2749     <t>"WRN:&lt;warning-code&gt;:&lt;warning-message&gt;" -
2750     <list>
2751     <t>if audio output device was set, but there are noteworthy
2752     issue(s) related, providing an appropriate warning code and
2753     warning message</t>
2754     </list>
2755     </t>
2756     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
2757     <list>
2758     <t>in case it failed, providing an appropriate error code and error message</t>
2759     </list>
2760     </t>
2761     </list>
2762     </t>
2763     <t>Examples:</t>
2764     <t>
2765     <list>
2766     <t></t>
2767     </list>
2768     </t>
2769     </section>
2770    
2771 schoenebeck 973 <section title="Setting audio output type" anchor="SET CHANNEL AUDIO_OUTPUT_TYPE">
2772 schoenebeck 151 <t>DEPRECATED: THIS COMMAND WILL DISAPPEAR SOON!</t>
2773    
2774     <t>The front-end can alter the audio output type on a specific sampler
2775     channel by sending the following command:</t>
2776     <t>
2777     <list>
2778     <t>SET CHANNEL AUDIO_OUTPUT_TYPE &lt;sampler-channel&gt; &lt;audio-output-type&gt;</t>
2779     </list>
2780     </t>
2781 schoenebeck 222 <t>Where &lt;audio-output-type&gt; is currently either "ALSA" or "JACK" and
2782 schoenebeck 151 &lt;sampler-channel&gt; is the respective sampler channel number.</t>
2783    
2784     <t>Possible Answers:</t>
2785     <t>
2786     <list>
2787     <t>"OK" -
2788     <list>
2789     <t>on success</t>
2790     </list>
2791     </t>
2792     <t>"WRN:&lt;warning-code&gt;:&lt;warning-message&gt;" -
2793     <list>
2794     <t>if audio output type was set, but there are noteworthy
2795     issue(s) related, providing an appropriate warning code and
2796     warning message</t>
2797     </list>
2798     </t>
2799     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
2800     <list>
2801     <t>in case it failed, providing an appropriate error code and error message</t>
2802     </list>
2803     </t>
2804     </list>
2805     </t>
2806     <t>Examples:</t>
2807     <t>
2808     <list>
2809     <t></t>
2810     </list>
2811     </t>
2812     </section>
2813    
2814 schoenebeck 534 <section title="Setting audio output channel" anchor="SET CHANNEL AUDIO_OUTPUT_CHANNEL">
2815 schoenebeck 151 <t>The front-end can alter the audio output channel on a specific
2816     sampler channel by sending the following command:</t>
2817     <t>
2818     <list>
2819     <t>SET CHANNEL AUDIO_OUTPUT_CHANNEL &lt;sampler-chan&gt; &lt;audio-out&gt; &lt;audio-in&gt;</t>
2820     </list>
2821     </t>
2822 schoenebeck 571 <t>Where &lt;sampler-chan&gt; is the sampler channel number
2823     as returned by the <xref target="ADD CHANNEL">"ADD CHANNEL"</xref>
2824     or <xref target="LIST CHANNELS">"LIST CHANNELS"</xref> command, &lt;audio-out&gt; is the
2825 schoenebeck 499 numerical ID of the sampler channel's audio output channel which should be
2826     rerouted and &lt;audio-in&gt; is the numerical ID of the audio channel of the selected audio
2827 schoenebeck 151 output device where &lt;audio-out&gt; should be routed to.</t>
2828    
2829     <t>Possible Answers:</t>
2830     <t>
2831     <list>
2832     <t>"OK" -
2833     <list>
2834     <t>on success</t>
2835     </list>
2836     </t>
2837     <t>"WRN:&lt;warning-code&gt;:&lt;warning-message&gt;" -
2838     <list>
2839     <t>if audio output channel was set, but there are noteworthy
2840     issue(s) related, providing an appropriate warning code and
2841     warning message</t>
2842     </list>
2843     </t>
2844     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
2845     <list>
2846     <t>in case it failed, providing an appropriate error code and error message</t>
2847     </list>
2848     </t>
2849     </list>
2850     </t>
2851     <t>Examples:</t>
2852     <t>
2853     <list>
2854     <t></t>
2855     </list>
2856     </t>
2857     </section>
2858    
2859 schoenebeck 534 <section title="Setting MIDI input device" anchor="SET CHANNEL MIDI_INPUT_DEVICE">
2860 schoenebeck 151 <t>The front-end can set the MIDI input device on a specific sampler
2861     channel by sending the following command:</t>
2862     <t>
2863     <list>
2864     <t>SET CHANNEL MIDI_INPUT_DEVICE &lt;sampler-channel&gt; &lt;midi-device-id&gt;</t>
2865     </list>
2866     </t>
2867 schoenebeck 571 <t>Where &lt;sampler-channel&gt; is the sampler channel number
2868     as returned by the <xref target="ADD CHANNEL">"ADD CHANNEL"</xref>
2869     or <xref target="LIST CHANNELS">"LIST CHANNELS"</xref> command
2870     and &lt;midi-device-id&gt; is the numerical ID of the MIDI input device as returned by the
2871     <xref target="CREATE MIDI_INPUT_DEVICE">"CREATE MIDI_INPUT_DEVICE"</xref>
2872     or <xref target="LIST MIDI_INPUT_DEVICES">"LIST MIDI_INPUT_DEVICES"</xref> command.</t>
2873 schoenebeck 151
2874     <t>Possible Answers:</t>
2875     <t>
2876     <list>
2877     <t>"OK" -
2878     <list>
2879     <t>on success</t>
2880     </list>
2881     </t>
2882     <t>"WRN:&lt;warning-code&gt;:&lt;warning-message&gt;" -
2883     <list>
2884     <t>if MIDI input device was set, but there are noteworthy
2885     issue(s) related, providing an appropriate warning code and
2886     warning message</t>
2887     </list>
2888     </t>
2889     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
2890     <list>
2891     <t>in case it failed, providing an appropriate error code and error message</t>
2892     </list>
2893     </t>
2894     </list>
2895     </t>
2896     <t>Examples:</t>
2897     <t>
2898     <list>
2899     <t></t>
2900     </list>
2901     </t>
2902     </section>
2903    
2904 schoenebeck 534 <section title="Setting MIDI input type" anchor="SET CHANNEL MIDI_INPUT_TYPE">
2905 schoenebeck 151 <t>DEPRECATED: THIS COMMAND WILL DISAPPEAR SOON!</t>
2906    
2907     <t>The front-end can alter the MIDI input type on a specific sampler
2908     channel by sending the following command:</t>
2909     <t>
2910     <list>
2911     <t>SET CHANNEL MIDI_INPUT_TYPE &lt;sampler-channel&gt; &lt;midi-input-type&gt;</t>
2912     </list>
2913     </t>
2914 schoenebeck 222 <t>Where &lt;midi-input-type&gt; is currently only "ALSA" and
2915 schoenebeck 151 &lt;sampler-channel&gt; is the respective sampler channel number.</t>
2916    
2917     <t>Possible Answers:</t>
2918     <t>
2919     <list>
2920     <t>"OK" -
2921     <list>
2922     <t>on success</t>
2923     </list>
2924     </t>
2925     <t>"WRN:&lt;warning-code&gt;:&lt;warning-message&gt;" -
2926     <list>
2927     <t>if MIDI input type was set, but there are noteworthy
2928     issue(s) related, providing an appropriate warning code and
2929     warning message</t>
2930     </list>
2931     </t>
2932     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
2933     <list>
2934     <t>in case it failed, providing an appropriate error code and error message</t>
2935     </list>
2936     </t>
2937     </list>
2938     </t>
2939     <t>Examples:</t>
2940     <t>
2941     <list>
2942     <t></t>
2943     </list>
2944     </t>
2945     </section>
2946    
2947 schoenebeck 534 <section title="Setting MIDI input port" anchor="SET CHANNEL MIDI_INPUT_PORT">
2948 schoenebeck 499 <t>The front-end can alter the MIDI input port on a specific sampler
2949 schoenebeck 151 channel by sending the following command:</t>
2950     <t>
2951     <list>
2952     <t>SET CHANNEL MIDI_INPUT_PORT &lt;sampler-channel&gt; &lt;midi-input-port&gt;</t>
2953     </list>
2954     </t>
2955     <t>Where &lt;midi-input-port&gt; is a MIDI input port number of the
2956     MIDI input device connected to the sampler channel given by
2957     &lt;sampler-channel&gt;.</t>
2958    
2959     <t>Possible Answers:</t>
2960     <t>
2961     <list>
2962     <t>"OK" -
2963     <list>
2964     <t>on success</t>
2965     </list>
2966     </t>
2967     <t>"WRN:&lt;warning-code&gt;:&lt;warning-message&gt;" -
2968     <list>
2969     <t>if MIDI input port was set, but there are noteworthy
2970     issue(s) related, providing an appropriate warning code and
2971     warning message</t>
2972     </list>
2973     </t>
2974     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
2975     <list>
2976 schoenebeck 561 <t>in case it failed, providing an appropriate error code and error message</t>
2977 schoenebeck 151 </list>
2978     </t>
2979     </list>
2980     </t>
2981     <t>Examples:</t>
2982     <t>
2983     <list>
2984     <t></t>
2985     </list>
2986     </t>
2987     </section>
2988    
2989 schoenebeck 534 <section title="Setting MIDI input channel" anchor="SET CHANNEL MIDI_INPUT_CHANNEL">
2990 schoenebeck 151 <t>The front-end can alter the MIDI channel a sampler channel should
2991     listen to by sending the following command:</t>
2992     <t>
2993     <list>
2994     <t>SET CHANNEL MIDI_INPUT_CHANNEL &lt;sampler-channel&gt; &lt;midi-input-chan&gt;</t>
2995     </list>
2996     </t>
2997 schoenebeck 499 <t>Where &lt;midi-input-chan&gt; is the number of the new MIDI input channel where
2998 schoenebeck 151 &lt;sampler-channel&gt; should listen to or "ALL" to listen on all 16 MIDI
2999     channels.</t>
3000    
3001     <t>Possible Answers:</t>
3002     <t>
3003     <list>
3004     <t>"OK" -
3005     <list>
3006     <t>on success</t>
3007     </list>
3008     </t>
3009     <t>"WRN:&lt;warning-code&gt;:&lt;warning-message&gt;" -
3010     <list>
3011     <t>if MIDI input channel was set, but there are noteworthy
3012     issue(s) related, providing an appropriate warning code and
3013     warning message</t>
3014     </list>
3015     </t>
3016     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
3017     <list>
3018     <t>in case it failed, providing an appropriate error code and error message</t>
3019     </list>
3020     </t>
3021     </list>
3022     </t>
3023     <t>Examples:</t>
3024     <t>
3025     <list>
3026     <t></t>
3027     </list>
3028     </t>
3029     </section>
3030    
3031 schoenebeck 534 <section title="Setting channel volume" anchor="SET CHANNEL VOLUME">
3032 schoenebeck 151 <t>The front-end can alter the volume of a sampler channel by sending
3033     the following command:</t>
3034     <t>
3035     <list>
3036     <t>SET CHANNEL VOLUME &lt;sampler-channel&gt; &lt;volume&gt;</t>
3037     </list>
3038     </t>
3039     <t>Where &lt;volume&gt; is an optionally dotted positive number (a value
3040     smaller than 1.0 means attenuation, whereas a value greater than
3041     1.0 means amplification) and &lt;sampler-channel&gt; defines the sampler
3042     channel where this volume factor should be set.</t>
3043    
3044     <t>Possible Answers:</t>
3045     <t>
3046     <list>
3047     <t>"OK" -
3048     <list>
3049     <t>on success</t>
3050     </list>
3051     </t>
3052     <t>"WRN:&lt;warning-code&gt;:&lt;warning-message&gt;" -
3053     <list>
3054     <t>if channel volume was set, but there are noteworthy
3055     issue(s) related, providing an appropriate warning code and
3056     warning message</t>
3057     </list>
3058     </t>
3059     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
3060     <list>
3061     <t>in case it failed, providing an appropriate error code and error message</t>
3062     </list>
3063     </t>
3064     </list>
3065     </t>
3066     <t>Examples:</t>
3067     <t>
3068     <list>
3069     <t></t>
3070     </list>
3071     </t>
3072     </section>
3073    
3074 iliev 706 <section title="Muting a sampler channel" anchor="SET CHANNEL MUTE">
3075     <t>The front-end can mute/unmute a specific sampler
3076     channel by sending the following command:</t>
3077     <t>
3078     <list>
3079     <t>SET CHANNEL MUTE &lt;sampler-channel&gt; &lt;mute&gt;</t>
3080     </list>
3081     </t>
3082     <t>Where &lt;sampler-channel&gt; is the respective sampler channel
3083     number as returned by the <xref target="ADD CHANNEL">"ADD CHANNEL"</xref>
3084     or <xref target="LIST CHANNELS">"LIST CHANNELS"</xref> command and
3085     &lt;mute&gt; should be replaced either by "1" to mute the channel or "0"
3086     to unmute the channel.</t>
3087    
3088     <t>Possible Answers:</t>
3089     <t>
3090     <list>
3091     <t>"OK" -
3092     <list>
3093     <t>on success</t>
3094     </list>
3095     </t>
3096     <t>"WRN:&lt;warning-code&gt;:&lt;warning-message&gt;" -
3097     <list>
3098     <t>if the channel was muted/unmuted, but there are noteworthy
3099     issue(s) related, providing an appropriate warning code and
3100     warning message</t>
3101     </list>
3102     </t>
3103     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
3104     <list>
3105     <t>in case it failed, providing an appropriate error code and error message</t>
3106     </list>
3107     </t>
3108     </list>
3109     </t>
3110     <t>Examples:</t>
3111     <t>
3112     <list>
3113     <t></t>
3114     </list>
3115     </t>
3116     </section>
3117    
3118     <section title="Soloing a sampler channel" anchor="SET CHANNEL SOLO">
3119     <t>The front-end can solo/unsolo a specific sampler channel
3120     by sending the following command:</t>
3121     <t>
3122     <list>
3123     <t>SET CHANNEL SOLO &lt;sampler-channel&gt; &lt;solo&gt;</t>
3124     </list>
3125     </t>
3126     <t>Where &lt;sampler-channel&gt; is the respective sampler channel
3127     number as returned by the <xref target="ADD CHANNEL">"ADD CHANNEL"</xref>
3128     or <xref target="LIST CHANNELS">"LIST CHANNELS"</xref> command and
3129     &lt;solo&gt; should be replaced either by "1" to solo the channel or "0"
3130     to unsolo the channel.</t>
3131    
3132     <t>Possible Answers:</t>
3133     <t>
3134     <list>
3135     <t>"OK" -
3136     <list>
3137     <t>on success</t>
3138     </list>
3139     </t>
3140     <t>"WRN:&lt;warning-code&gt;:&lt;warning-message&gt;" -
3141     <list>
3142     <t>if the channel was soloed/unsoloed, but there are noteworthy
3143     issue(s) related, providing an appropriate warning code and
3144     warning message</t>
3145     </list>
3146     </t>
3147     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
3148     <list>
3149     <t>in case it failed, providing an appropriate error code and error message</t>
3150     </list>
3151     </t>
3152     </list>
3153     </t>
3154     <t>Examples:</t>
3155     <t>
3156     <list>
3157     <t></t>
3158     </list>
3159     </t>
3160     </section>
3161    
3162 schoenebeck 973 <section title="Assigning a MIDI instrument map to a sampler channel" anchor="SET CHANNEL MIDI_INSTRUMENT_MAP">
3163     <t>The front-end can assign a MIDI instrument map to a specific sampler channel
3164     by sending the following command:</t>
3165     <t>
3166     <list>
3167     <t>SET CHANNEL MIDI_INSTRUMENT_MAP &lt;sampler-channel&gt; &lt;map&gt;</t>
3168     </list>
3169     </t>
3170     <t>Where &lt;sampler-channel&gt; is the respective sampler channel
3171     number as returned by the <xref target="ADD CHANNEL">"ADD CHANNEL"</xref>
3172     or <xref target="LIST CHANNELS">"LIST CHANNELS"</xref> command and
3173     &lt;map&gt; can have the following possibilites:</t>
3174     <t>
3175     <list>
3176     <t>"NONE" -
3177     <list>
3178     <t>This is the default setting. In this case
3179     the sampler channel is not assigned any MIDI
3180     instrument map and thus will ignore all MIDI
3181     program change messages.</t>
3182     </list>
3183     </t>
3184     <t>"DEFAULT" -
3185     <list>
3186     <t>The sampler channel will always use the
3187     default MIDI instrument map to handle MIDI
3188     program change messages.</t>
3189     </list>
3190     </t>
3191     <t>numeric ID -
3192     <list>
3193     <t>You can assign a specific MIDI instrument map
3194     by replacing &lt;map&gt; with the respective numeric
3195     ID of the MIDI instrument map as returned by the
3196     <xref target="LIST MIDI_INSTRUMENT_MAPS">"LIST MIDI_INSTRUMENT_MAPS"</xref>
3197     command. Once that map will be deleted, the sampler
3198     channel would fall back to "NONE".</t>
3199     </list>
3200     </t>
3201     </list>
3202     </t>
3203     <t>Read chapter <xref target="MIDI Instrument Mapping">"MIDI Instrument Mapping"</xref>
3204     for details regarding MIDI instrument mapping.</t>
3205    
3206     <t>Possible Answers:</t>
3207     <t>
3208     <list>
3209     <t>"OK" -
3210     <list>
3211     <t>on success</t>
3212     </list>
3213     </t>
3214     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
3215     <list>
3216     <t>in case it failed, providing an appropriate error code and error message</t>
3217     </list>
3218     </t>
3219     </list>
3220     </t>
3221    
3222     <t>Examples:</t>
3223     <t>
3224     <list>
3225     <t></t>
3226     </list>
3227     </t>
3228     </section>
3229    
3230 schoenebeck 1001 <section title="Adding an effect send to a sampler channel" anchor="CREATE FX_SEND">
3231     <t>The front-end can create an additional effect send on a specific sampler channel
3232     by sending the following command:</t>
3233     <t>
3234     <list>
3235     <t>CREATE FX_SEND &lt;sampler-channel&gt; &lt;midi-ctrl&gt; [&lt;name&gt;]</t>
3236     </list>
3237     </t>
3238     <t>Where &lt;sampler-channel&gt; is the respective sampler channel
3239     number as returned by the <xref target="ADD CHANNEL">"ADD CHANNEL"</xref>
3240     or <xref target="LIST CHANNELS">"LIST CHANNELS"</xref> command, that is the
3241     sampler channel on which the effect send should be created on, &lt;midi-ctrl&gt;
3242     is a number between 0..127 defining the MIDI controller which can alter the
3243     effect send level and &lt;name&gt; is an optional argument defining a name
3244     for the effect send entity. The name does not have to be unique.</t>
3245    
3246     <t>By default, that is as initial routing, the effect send's audio channels
3247     are automatically routed to the last audio channels of the sampler channel's
3248     audio output device, that way you can i.e. first increase the amount of audio
3249     channels on the audio output device for having dedicated effect send output
3250     channels and when "CREATE FX_SEND" is called, those channels will automatically
3251     be picked. You can alter the destination channels however with
3252     <xref target="SET FX_SEND AUDIO_OUTPUT_CHANNEL">"SET FX_SEND AUDIO_OUTPUT_CHANNEL"</xref>.
3253     </t>
3254    
3255     <t>Note: Create effect sends on a sampler channel only when needed, because having effect
3256     sends on a sampler channel will decrease runtime performance, because for implementing channel
3257     effect sends, separate (sampler channel local) audio buffers are needed to render and mix
3258     the voices and route the audio signal afterwards to the master outputs and effect send
3259     outputs (along with their respective effect send levels). A sampler channel without effect
3260     sends however can mix its voices directly into the audio output devices's audio buffers
3261     and is thus faster.
3262     </t>
3263    
3264     <t>Possible Answers:</t>
3265     <t>
3266     <list>
3267     <t>"OK[&lt;fx-send-id&gt;]" -
3268     <list>
3269     <t>in case a new effect send could be added to the
3270     sampler channel, where &lt;fx-send-id&gt; reflects the
3271     unique ID of the newly created effect send entity</t>
3272     </list>
3273     </t>
3274     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
3275     <list>
3276     <t>when a new effect send could not be added, i.e.
3277     due to invalid parameters</t>
3278     </list>
3279     </t>
3280     </list>
3281     </t>
3282    
3283     <t>Examples:</t>
3284     <t>
3285     <list>
3286     <t>C: "CREATE FX_SEND 0 91 'Reverb Send'"</t>
3287     <t>S: "OK[0]"</t>
3288     </list>
3289     </t>
3290 schoenebeck 1026 <t>
3291 schoenebeck 1001 <list>
3292     <t>C: "CREATE FX_SEND 0 93"</t>
3293     <t>S: "OK[1]"</t>
3294     </list>
3295     </t>
3296     </section>
3297    
3298     <section title="Removing an effect send from a sampler channel" anchor="DESTROY FX_SEND">
3299     <t>The front-end can remove an existing effect send on a specific sampler channel
3300     by sending the following command:</t>
3301     <t>
3302     <list>
3303     <t>DESTROY FX_SEND &lt;sampler-channel&gt; &lt;fx-send-id&gt;</t>
3304     </list>
3305     </t>
3306     <t>Where &lt;sampler-channel&gt; is the respective sampler channel
3307     number as returned by the <xref target="ADD CHANNEL">"ADD CHANNEL"</xref>
3308     or <xref target="LIST CHANNELS">"LIST CHANNELS"</xref> command, that is the
3309     sampler channel from which the effect send should be removed from and
3310     &lt;fx-send-id&gt; is the respective effect send number as returned by the
3311     <xref target="CREATE FX_SEND">"CREATE FX_SEND"</xref>
3312     or <xref target="LIST FX_SENDS">"LIST FX_SENDS"</xref> command.</t>
3313    
3314     <t>Possible Answers:</t>
3315     <t>
3316     <list>
3317     <t>"OK" -
3318     <list>
3319     <t>on success</t>
3320     </list>
3321     </t>
3322     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
3323     <list>
3324     <t>in case it failed, providing an appropriate error code and
3325     error message</t>
3326     </list>
3327     </t>
3328     </list>
3329     </t>
3330    
3331     <t>Example:</t>
3332     <t>
3333     <list>
3334     <t>C: "DESTROY FX_SEND 0 0"</t>
3335     <t>S: "OK"</t>
3336     </list>
3337     </t>
3338     </section>
3339    
3340     <section title="Getting amount of effect sends on a sampler channel" anchor="GET FX_SENDS">
3341     <t>The front-end can ask for the amount of effect sends on a specific sampler channel
3342     by sending the following command:</t>
3343     <t>
3344     <list>
3345     <t>GET FX_SENDS &lt;sampler-channel&gt;</t>
3346     </list>
3347     </t>
3348     <t>Where &lt;sampler-channel&gt; is the respective sampler channel
3349     number as returned by the <xref target="ADD CHANNEL">"ADD CHANNEL"</xref>
3350     or <xref target="LIST CHANNELS">"LIST CHANNELS"</xref> command.</t>
3351    
3352     <t>Possible Answers:</t>
3353     <t>
3354     <list>
3355     <t>The sampler will answer by returning the number of effect
3356     sends on the given sampler channel.</t>
3357     </list>
3358     </t>
3359    
3360     <t>Example:</t>
3361     <t>
3362     <list>
3363     <t>C: "GET FX_SENDS 0"</t>
3364     <t>S: "2"</t>
3365     </list>
3366     </t>
3367     </section>
3368    
3369     <section title="Listing all effect sends on a sampler channel" anchor="LIST FX_SENDS">
3370     <t>The front-end can ask for a list of effect sends on a specific sampler channel
3371     by sending the following command:</t>
3372     <t>
3373     <list>
3374     <t>LIST FX_SENDS &lt;sampler-channel&gt;</t>
3375     </list>
3376     </t>
3377     <t>Where &lt;sampler-channel&gt; is the respective sampler channel
3378     number as returned by the <xref target="ADD CHANNEL">"ADD CHANNEL"</xref>
3379     or <xref target="LIST CHANNELS">"LIST CHANNELS"</xref> command.</t>
3380    
3381     <t>Possible Answers:</t>
3382     <t>
3383     <list>
3384     <t>The sampler will answer by returning a comma separated list
3385     with all effect sends' numerical IDs on the given sampler
3386     channel.</t>
3387     </list>
3388     </t>
3389    
3390     <t>Examples:</t>
3391     <t>
3392     <list>
3393     <t>C: "LIST FX_SENDS 0"</t>
3394     <t>S: "0,1"</t>
3395     </list>
3396     </t>
3397     <t>
3398     <list>
3399     <t>C: "LIST FX_SENDS 1"</t>
3400     <t>S: ""</t>
3401     </list>
3402     </t>
3403     </section>
3404    
3405     <section title="Getting effect send information" anchor="GET FX_SEND INFO">
3406     <t>The front-end can ask for the current settings of an effect send entity
3407     by sending the following command:</t>
3408     <t>
3409     <list>
3410     <t>GET FX_SEND INFO &lt;sampler-channel&gt; &lt;fx-send-id&gt;</t>
3411     </list>
3412     </t>
3413     <t>Where &lt;sampler-channel&gt; is the sampler channel number
3414     as returned by the <xref target="ADD CHANNEL">"ADD CHANNEL"</xref>
3415     or <xref target="LIST CHANNELS">"LIST CHANNELS"</xref> command and
3416     &lt;fx-send-id&gt; reflects the numerical ID of the effect send entity
3417     as returned by the <xref target="CREATE FX_SEND">"CREATE FX_SEND"</xref>
3418     or <xref target="LIST FX_SENDS">"LIST FX_SENDS"</xref> command.
3419     </t>
3420    
3421     <t>Possible Answers:</t>
3422     <t>
3423     <list>
3424     <t>The sampler will answer by sending a &lt;CRLF&gt; separated list.
3425     Each answer line begins with the settings category name
3426     followed by a colon and then a space character &lt;SP&gt; and finally
3427     the info character string to that setting category. At the
3428     moment the following categories are defined:</t>
3429    
3430     <t>
3431     <list>
3432     <t>NAME -
3433     <list>
3434     <t>name of the effect send entity</t>
3435     </list>
3436     </t>
3437 schoenebeck 1026 <t>MIDI_CONTROLLER -
3438     <list>
3439     <t>a value between 0 and 127 reflecting the MIDI controller
3440     which is able to modify the effect send's send level</t>
3441     </list>
3442     </t>
3443     <t>LEVEL -
3444     <list>
3445     <t>optionally dotted number reflecting the effect send's
3446     current send level (where a value &lt; 1.0 means attenuation
3447     and a value > 1.0 means amplification)</t>
3448     </list>
3449     </t>
3450 schoenebeck 1001 <t>AUDIO_OUTPUT_ROUTING -
3451     <list>
3452     <t>comma separated list which reflects to which audio
3453     channel of the selected audio output device each
3454     effect send output channel is routed to, e.g. "0,3" would
3455     mean the effect send's output channel 0 is routed to channel
3456     0 of the audio output device and the effect send's output
3457     channel 1 is routed to the channel 3 of the audio
3458     output device (see
3459     <xref target="SET FX_SEND AUDIO_OUTPUT_CHANNEL">"SET FX_SEND AUDIO_OUTPUT_CHANNEL"</xref>
3460     for details)</t>
3461     </list>
3462     </t>
3463     </list>
3464     </t>
3465     </list>
3466     </t>
3467     <t>The mentioned fields above don't have to be in particular order.</t>
3468    
3469     <t>Example:</t>
3470     <t>
3471     <list>
3472     <t>C: "GET FX_SEND INFO 0 0"</t>
3473     <t>S: "NAME: Reverb Send"</t>
3474 schoenebeck 1026 <t>&nbsp;&nbsp;&nbsp;"MIDI_CONTROLLER: 91"</t>
3475     <t>&nbsp;&nbsp;&nbsp;"LEVEL: 0.3"</t>
3476 schoenebeck 1001 <t>&nbsp;&nbsp;&nbsp;"AUDIO_OUTPUT_ROUTING: 2,3"</t>
3477     <t>&nbsp;&nbsp;&nbsp;"."</t>
3478     </list>
3479     </t>
3480     </section>
3481    
3482     <section title="Altering effect send's audio routing" anchor="SET FX_SEND AUDIO_OUTPUT_CHANNEL">
3483     <t>The front-end can alter the destination of an effect send's audio channel on a specific
3484     sampler channel by sending the following command:</t>
3485     <t>
3486     <list>
3487     <t>SET FX_SEND AUDIO_OUTPUT_CHANNEL &lt;sampler-chan&gt; &lt;fx-send-id&gt; &lt;audio-src&gt; &lt;audio-dst&gt;</t>
3488     </list>
3489     </t>
3490     <t>Where &lt;sampler-chan&gt; is the sampler channel number
3491     as returned by the <xref target="ADD CHANNEL">"ADD CHANNEL"</xref>
3492     or <xref target="LIST CHANNELS">"LIST CHANNELS"</xref> command,
3493     &lt;fx-send-id&gt; reflects the numerical ID of the effect send entity
3494     as returned by the <xref target="CREATE FX_SEND">"CREATE FX_SEND"</xref>
3495     or <xref target="LIST FX_SENDS">"LIST FX_SENDS"</xref> command,
3496     &lt;audio-src&gt; is the numerical ID of the effect send's audio channel
3497     which should be rerouted and &lt;audio-dst&gt; is the numerical ID of
3498     the audio channel of the selected audio output device where &lt;audio-src&gt;
3499     should be routed to.</t>
3500    
3501     <t>Note that effect sends can only route audio to the same audio output
3502     device as assigned to the effect send's sampler channel. Also note that an
3503     effect send entity does always have exactly as much audio channels as its
3504     sampler channel. So if the sampler channel is stereo, the effect send does
3505     have two audio channels as well. Also keep in mind that the amount of audio
3506     channels on a sampler channel might be dependant not only to the deployed
3507     sampler engine on the sampler channel, but also dependant to the instrument
3508     currently loaded. However you can (effectively) turn an i.e. stereo effect
3509     send into a mono one by simply altering its audio routing appropriately.</t>
3510    
3511     <t>Possible Answers:</t>
3512     <t>
3513     <list>
3514     <t>"OK" -
3515     <list>
3516     <t>on success</t>
3517     </list>
3518     </t>
3519     <t>"WRN:&lt;warning-code&gt;:&lt;warning-message&gt;" -
3520     <list>
3521     <t>if audio output channel was set, but there are noteworthy
3522     issue(s) related, providing an appropriate warning code and
3523     warning message</t>
3524     </list>
3525     </t>
3526     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
3527     <list>
3528     <t>in case it failed, providing an appropriate error code and error message</t>
3529     </list>
3530     </t>
3531     </list>
3532     </t>
3533     <t>Example:</t>
3534     <t>
3535     <list>
3536     <t>C: "SET FX_SEND AUDIO_OUTPUT_CHANNEL 0 0 0 2"</t>
3537     <t>S: "OK"</t>
3538     </list>
3539     </t>
3540     </section>
3541    
3542 schoenebeck 1026 <section title="Altering effect send's MIDI controller" anchor="SET FX_SEND MIDI_CONTROLLER">
3543     <t>The front-end can alter the MIDI controller of an effect
3544     send entity by sending the following command:</t>
3545     <t>
3546     <list>
3547     <t>SET FX_SEND MIDI_CONTROLLER &lt;sampler-chan&gt; &lt;fx-send-id&gt; &lt;midi-ctrl&gt;</t>
3548     </list>
3549     </t>
3550     <t>Where &lt;sampler-chan&gt; is the sampler channel number
3551     as returned by the <xref target="ADD CHANNEL">"ADD CHANNEL"</xref>
3552     or <xref target="LIST CHANNELS">"LIST CHANNELS"</xref> command,
3553     &lt;fx-send-id&gt; reflects the numerical ID of the effect send entity
3554     as returned by the <xref target="CREATE FX_SEND">"CREATE FX_SEND"</xref>
3555     or <xref target="LIST FX_SENDS">"LIST FX_SENDS"</xref> command and
3556     &lt;midi-ctrl&gt; reflects the MIDI controller which shall be
3557     able to modify the effect send's send level.</t>
3558 schoenebeck 1001
3559 schoenebeck 1026 <t>Possible Answers:</t>
3560     <t>
3561     <list>
3562     <t>"OK" -
3563     <list>
3564     <t>on success</t>
3565     </list>
3566     </t>
3567     <t>"WRN:&lt;warning-code&gt;:&lt;warning-message&gt;" -
3568     <list>
3569     <t>if MIDI controller was set, but there are noteworthy
3570     issue(s) related, providing an appropriate warning code and
3571     warning message</t>
3572     </list>
3573     </t>
3574     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
3575     <list>
3576     <t>in case it failed, providing an appropriate error code and error message</t>
3577     </list>
3578     </t>
3579     </list>
3580     </t>
3581     <t>Example:</t>
3582     <t>
3583     <list>
3584     <t>C: "SET FX_SEND MIDI_CONTROLLER 0 0 91"</t>
3585     <t>S: "OK"</t>
3586     </list>
3587     </t>
3588     </section>
3589    
3590     <section title="Altering effect send's send level" anchor="SET FX_SEND LEVEL">
3591     <t>The front-end can alter the current send level of an effect
3592     send entity by sending the following command:</t>
3593     <t>
3594     <list>
3595     <t>SET FX_SEND LEVEL &lt;sampler-chan&gt; &lt;fx-send-id&gt; &lt;volume&gt;</t>
3596     </list>
3597     </t>
3598     <t>Where &lt;sampler-chan&gt; is the sampler channel number
3599     as returned by the <xref target="ADD CHANNEL">"ADD CHANNEL"</xref>
3600     or <xref target="LIST CHANNELS">"LIST CHANNELS"</xref> command,
3601     &lt;fx-send-id&gt; reflects the numerical ID of the effect send entity
3602     as returned by the <xref target="CREATE FX_SEND">"CREATE FX_SEND"</xref>
3603     or <xref target="LIST FX_SENDS">"LIST FX_SENDS"</xref> command and
3604     &lt;volume&gt; is an optionally dotted positive number (a value
3605     smaller than 1.0 means attenuation, whereas a value greater than
3606     1.0 means amplification) reflecting the new send level.</t>
3607    
3608     <t>Possible Answers:</t>
3609     <t>
3610     <list>
3611     <t>"OK" -
3612     <list>
3613     <t>on success</t>
3614     </list>
3615     </t>
3616     <t>"WRN:&lt;warning-code&gt;:&lt;warning-message&gt;" -
3617     <list>
3618     <t>if new send level was set, but there are noteworthy
3619     issue(s) related, providing an appropriate warning code and
3620     warning message</t>
3621     </list>
3622     </t>
3623     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
3624     <list>
3625     <t>in case it failed, providing an appropriate error code and error message</t>
3626     </list>
3627     </t>
3628     </list>
3629     </t>
3630     <t>Example:</t>
3631     <t>
3632     <list>
3633     <t>C: "SET FX_SEND LEVEL 0 0 0.15"</t>
3634     <t>S: "OK"</t>
3635     </list>
3636     </t>
3637     </section>
3638    
3639 schoenebeck 534 <section title="Resetting a sampler channel" anchor="RESET CHANNEL">
3640 schoenebeck 151 <t>The front-end can reset a particular sampler channel by sending the following command:</t>
3641     <t>
3642     <list>
3643     <t>RESET CHANNEL &lt;sampler-channel&gt;</t>
3644     </list>
3645     </t>
3646     <t>
3647     Where &lt;sampler-channel&gt; defines the sampler channel to be reset.
3648     This will cause the engine on that sampler channel, its voices and
3649     eventually disk streams and all control and status variables to be
3650     reset.</t>
3651    
3652     <t>Possible Answers:</t>
3653     <t>
3654     <list>
3655     <t>"OK" -
3656     <list>
3657     <t>on success</t>
3658     </list>
3659     </t>
3660     <t>"WRN:&lt;warning-code&gt;:&lt;warning-message&gt;" -
3661     <list>
3662     <t>if channel was reset, but there are noteworthy issue(s)
3663     related, providing an appropriate warning code and warning
3664     message</t>
3665     </list>
3666     </t>
3667     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
3668     <list>
3669     <t>in case it failed, providing an appropriate error code and
3670     error message</t>
3671     </list>
3672     </t>
3673     </list>
3674     </t>
3675     <t>Examples:</t>
3676     <t>
3677     <list>
3678     <t></t>
3679     </list>
3680     </t>
3681     </section>
3682     </section>
3683    
3684     <section title="Controlling connection">
3685     <t>The following commands are used to control the connection to LinuxSampler.</t>
3686    
3687 schoenebeck 534 <section title="Register front-end for receiving event messages" anchor="SUBSCRIBE">
3688 schoenebeck 151 <t>The front-end can register itself to the LinuxSampler application to
3689     be informed about noteworthy events by sending this command:</t>
3690     <t>
3691     <list>
3692     <t>SUBSCRIBE &lt;event-id&gt;</t>
3693     </list>
3694     </t>
3695     <t>where &lt;event-id&gt; will be replaced by the respective event that
3696     client wants to subscribe to.</t>
3697    
3698     <t>Possible Answers:</t>
3699     <t>
3700     <list>
3701     <t>"OK" -
3702     <list>
3703     <t>on success</t>
3704     </list>
3705     </t>
3706     <t>"WRN:&lt;warning-code&gt;:&lt;warning-message&gt;" -
3707     <list>
3708     <t>if registration succeeded, but there are noteworthy
3709     issue(s) related, providing an appropriate warning code and
3710     warning message</t>
3711     </list>
3712     </t>
3713     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
3714     <list>
3715     <t>in case it failed, providing an appropriate error code and
3716     error message</t>
3717     </list>
3718     </t>
3719     </list>
3720     </t>
3721     <t>Examples:</t>
3722     <t>
3723     <list>
3724     <t></t>
3725     </list>
3726     </t>
3727     </section>
3728    
3729 schoenebeck 534 <section title="Unregister front-end for not receiving event messages" anchor="UNSUBSCRIBE">
3730 schoenebeck 151 <t>The front-end can unregister itself if it doesn't want to receive event
3731     messages anymore by sending the following command:</t>
3732     <t>
3733     <list>
3734     <t>UNSUBSCRIBE &lt;event-id&gt;</t>
3735     </list>
3736     </t>
3737     <t>Where &lt;event-id&gt; will be replaced by the respective event that
3738     client doesn't want to receive anymore.</t>
3739    
3740     <t>Possible Answers:</t>
3741     <t>
3742     <list>
3743     <t>"OK" -
3744     <list>
3745     <t>on success</t>
3746     </list>
3747     </t>
3748     <t>"WRN:&lt;warning-code&gt;:&lt;warning-message&gt;" -
3749     <list>
3750     <t>if unregistration succeeded, but there are noteworthy
3751     issue(s) related, providing an appropriate warning code and
3752     warning message</t>
3753     </list>
3754     </t>
3755     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
3756     <list>
3757     <t>in case it failed, providing an appropriate error code and
3758     error message</t>
3759     </list>
3760     </t>
3761     </list>
3762     </t>
3763     <t>Examples:</t>
3764     <t>
3765     <list>
3766     <t></t>
3767     </list>
3768     </t>
3769     </section>
3770    
3771 schoenebeck 534 <section title="Enable or disable echo of commands" anchor="SET ECHO">
3772 schoenebeck 151 <t>To enable or disable back sending of commands to the client the following command can be used:</t>
3773     <t>
3774     <list>
3775     <t>SET ECHO &lt;value&gt;</t>
3776     </list>
3777     </t>
3778     <t>Where &lt;value&gt; should be replaced either by "1" to enable echo mode
3779     or "0" to disable echo mode. When echo mode is enabled, all
3780     commands send to LinuxSampler will be immediately send back and
3781     after this echo the actual response to the command will be
3782     returned. Echo mode will only be altered for the client connection
3783     that issued the "SET ECHO" command, not globally for all client
3784     connections.</t>
3785    
3786     <t>Possible Answers:</t>
3787     <t>
3788     <list>
3789     <t>"OK" -
3790     <list>
3791     <t>usually</t>
3792     </list>
3793     </t>
3794     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
3795     <list>
3796     <t>on syntax error, e.g. non boolean value</t>
3797     </list>
3798     </t>
3799     </list>
3800     </t>
3801     <t>Examples:</t>
3802     <t>
3803     <list>
3804     <t></t>
3805     </list>
3806     </t>
3807     </section>
3808    
3809 schoenebeck 534 <section title="Close client connection" anchor="QUIT">
3810 schoenebeck 151 <t>The client can close its network connection to LinuxSampler by sending the following command:</t>
3811     <t>
3812     <list>
3813     <t>QUIT</t>
3814     </list>
3815     </t>
3816     <t>This is probably more interesting for manual telnet connections to
3817     LinuxSampler than really useful for a front-end implementation.</t>
3818     </section>
3819     </section>
3820 schoenebeck 212
3821     <section title="Global commands">
3822     <t>The following commands have global impact on the sampler.</t>
3823    
3824 iliev 778 <section title="Current number of active voices" anchor="GET TOTAL_VOICE_COUNT">
3825     <t>The front-end can ask for the current number of active voices on
3826     the sampler by sending the following command:</t>
3827     <t>
3828     <list>
3829     <t>GET TOTAL_VOICE_COUNT</t>
3830     </list>
3831     </t>
3832    
3833     <t>Possible Answers:</t>
3834     <t>
3835     <list>
3836     <t>LinuxSampler will answer by returning the number of all active
3837     voices on the sampler.</t>
3838     </list>
3839     </t>
3840     </section>
3841    
3842     <section title="Maximum amount of active voices" anchor="GET TOTAL_VOICE_COUNT_MAX">
3843     <t>The front-end can ask for the maximum number of active voices
3844     by sending the following command:</t>
3845     <t>
3846     <list>
3847     <t>GET TOTAL_VOICE_COUNT_MAX</t>
3848     </list>
3849     </t>
3850    
3851     <t>Possible Answers:</t>
3852     <t>
3853     <list>
3854     <t>LinuxSampler will answer by returning the maximum number
3855     of active voices.</t>
3856     </list>
3857     </t>
3858     </section>
3859    
3860 schoenebeck 534 <section title="Reset sampler" anchor="RESET">
3861 schoenebeck 212 <t>The front-end can reset the whole sampler by sending the following command:</t>
3862     <t>
3863     <list>
3864     <t>RESET</t>
3865     </list>
3866     </t>
3867    
3868     <t>Possible Answers:</t>
3869     <t>
3870     <list>
3871     <t>"OK" -
3872     <list>
3873     <t>always</t>
3874     </list>
3875     </t>
3876     </list>
3877     </t>
3878     <t>Examples:</t>
3879     <t>
3880     <list>
3881     <t></t>
3882     </list>
3883     </t>
3884     </section>
3885 schoenebeck 571
3886     <section title="General sampler informations" anchor="GET SERVER INFO">
3887     <t>The client can ask for general informations about the LinuxSampler
3888     instance by sending the following command:</t>
3889     <t>
3890     <list>
3891     <t>GET SERVER INFO</t>
3892     </list>
3893     </t>
3894     <t>Possible Answers:</t>
3895     <t>
3896     <list>
3897     <t>LinuxSampler will answer by sending a &lt;CRLF&gt; separated list.
3898 schoenebeck 573 Each answer line begins with the information category name
3899 schoenebeck 571 followed by a colon and then a space character &lt;SP&gt; and finally
3900     the info character string to that information category. At the
3901     moment the following categories are defined:
3902     </t>
3903     <t>
3904     <list>
3905     <t>DESCRIPTION -
3906     <list>
3907     <t>arbitrary textual description about the sampler</t>
3908     </list>
3909     </t>
3910     <t>VERSION -
3911     <list>
3912     <t>version of the sampler</t>
3913     </list>
3914     </t>
3915     <t>PROTOCOL_VERSION -
3916     <list>
3917     <t>version of the LSCP specification the sampler
3918     complies with (see <xref target="LSCP versioning" /> for details)</t>
3919     </list>
3920     </t>
3921     </list>
3922     </t>
3923     </list>
3924     </t>
3925     <t>The mentioned fields above don't have to be in particular order.
3926     Other fields might be added in future.</t>
3927     </section>
3928 schoenebeck 1005
3929     <section title="Getting global volume attenuation" anchor="GET VOLUME">
3930     <t>The client can ask for the current global sampler-wide volume
3931     attenuation by sending the following command:</t>
3932     <t>
3933     <list>
3934     <t>GET VOLUME</t>
3935     </list>
3936     </t>
3937     <t>Possible Answers:</t>
3938     <t>
3939     <list>
3940     <t>The sampler will always answer by returning the optional
3941     dotted floating point coefficient, reflecting the current
3942     global volume attenuation.
3943     </t>
3944     </list>
3945     </t>
3946     <t>Note: it is up to the respective sampler engine whether to obey
3947     that global volume parameter or not, but in general all engines SHOULD
3948     use this parameter.</t>
3949     </section>
3950    
3951     <section title="Setting global volume attenuation" anchor="SET VOLUME">
3952     <t>The client can alter the current global sampler-wide volume
3953     attenuation by sending the following command:</t>
3954     <t>
3955     <list>
3956     <t>SET VOLUME &lt;volume&gt;</t>
3957     </list>
3958     </t>
3959     <t>Where &lt;volume&gt; should be replaced by the optional dotted
3960     floating point value, reflecting the new global volume parameter.
3961     This value might usually be in the range between 0.0 and 1.0, that
3962     is for attenuating the overall volume.</t>
3963    
3964     <t>Possible Answers:</t>
3965     <t>
3966     <list>
3967     <t>"OK" -
3968     <list>
3969     <t>on success</t>
3970     </list>
3971     </t>
3972     <t>"WRN:&lt;warning-code&gt;:&lt;warning-message&gt;" -
3973     <list>
3974     <t>if the global volume was set, but there are noteworthy
3975     issue(s) related, providing an appropriate warning code and
3976     warning message</t>
3977     </list>
3978     </t>
3979     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
3980     <list>
3981     <t>in case it failed, providing an appropriate error code and error message</t>
3982     </list>
3983     </t>
3984     </list>
3985     </t>
3986     </section>
3987 schoenebeck 212 </section>
3988 schoenebeck 944
3989    
3990 schoenebeck 973 <section title="MIDI Instrument Mapping" anchor="MIDI Instrument Mapping">
3991 schoenebeck 944 <t>The MIDI protocol provides a way to switch between instruments
3992     by sending so called MIDI bank select and MIDI program change
3993     messages which are essentially just numbers. The following commands
3994     allow to actually map arbitrary MIDI bank select / program change
3995     numbers with real instruments.</t>
3996 schoenebeck 973 <t>The sampler allows to manage an arbitrary amount of MIDI
3997     instrument maps which define which instrument to load on
3998     which MIDI program change message.</t>
3999     <t>By default, that is when the sampler is launched, there is no
4000     map, thus the sampler will simply ignore all program change
4001     messages. The front-end has to explicitly create at least one
4002     map, add entries to the map and tell the respective sampler
4003     channel(s) which MIDI instrument map to use, so the sampler
4004     knows how to react on a given program change message on the
4005     respective sampler channel, that is by switching to the
4006     respectively defined engine type and loading the respective
4007     instrument. See command
4008     <xref target="SET CHANNEL MIDI_INSTRUMENT_MAP">"SET CHANNEL MIDI_INSTRUMENT_MAP"</xref>
4009     for how to assign a MIDI instrument map to a sampler channel.</t>
4010 schoenebeck 944 <t>Also note per MIDI specification a bank select message does not
4011     cause to switch to another instrument. Instead when receiving a
4012     bank select message the bank value will be stored and a subsequent
4013     program change message (which may occur at any time) will finally
4014     cause the sampler to switch to the respective instrument as
4015     reflected by the current MIDI instrument map.</t>
4016    
4017 schoenebeck 973 <section title="Create a new MIDI instrument map" anchor="ADD MIDI_INSTRUMENT MAP">
4018     <t>The front-end can add a new MIDI instrument map by sending
4019     the following command:</t>
4020     <t>
4021     <list>
4022     <t>ADD MIDI_INSTRUMENT_MAP [&lt;name&gt;]</t>
4023     </list>
4024     </t>
4025     <t>Where &lt;name&gt; is an optional argument allowing to
4026     assign a custom name to the new map. MIDI instrument Map
4027     names do not have to be unique.</t>
4028    
4029     <t>Possible Answers:</t>
4030     <t>
4031     <list>
4032     <t>"OK[&lt;map&gt;]" -
4033     <list>
4034     <t>in case a new MIDI instrument map could
4035     be added, where &lt;map&gt; reflects the
4036     unique ID of the newly created MIDI
4037     instrument map</t>
4038     </list>
4039     </t>
4040     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
4041     <list>
4042     <t>when a new map could not be created, which
4043     might never occur in practice</t>
4044     </list>
4045     </t>
4046     </list>
4047     </t>
4048    
4049     <t>Examples:</t>
4050     <t>
4051     <list>
4052     <t>C: "ADD MIDI_INSTRUMENT_MAP 'Standard Map'"</t>
4053     <t>S: "OK[0]"</t>
4054     </list>
4055     </t>
4056     <t>
4057     <list>
4058     <t>C: "ADD MIDI_INSTRUMENT_MAP 'Standard Drumkit'"</t>
4059     <t>S: "OK[1]"</t>
4060     </list>
4061     </t>
4062     <t>
4063     <list>
4064     <t>C: "ADD MIDI_INSTRUMENT_MAP"</t>
4065     <t>S: "OK[5]"</t>
4066     </list>
4067     </t>
4068     </section>
4069    
4070     <section title="Delete one particular or all MIDI instrument maps" anchor="REMOVE MIDI_INSTRUMENT_MAP">
4071     <t>The front-end can delete a particular MIDI instrument map
4072     by sending the following command:</t>
4073     <t>
4074     <list>
4075     <t>REMOVE MIDI_INSTRUMENT_MAP &lt;map&gt;</t>
4076     </list>
4077     </t>
4078     <t>Where &lt;map&gt; reflects the unique ID of the map to delete
4079     as returned by the <xref target="LIST MIDI_INSTRUMENT_MAPS">"LIST MIDI_INSTRUMENT_MAPS"</xref>
4080     command.</t>
4081     <t>The front-end can delete all MIDI instrument maps by
4082     sending the following command:</t>
4083     <t>
4084     <list>
4085     <t>REMOVE MIDI_INSTRUMENT_MAP ALL</t>
4086     </list>
4087     </t>
4088    
4089     <t>Possible Answers:</t>
4090     <t>
4091     <list>
4092     <t>"OK" -
4093     <list>
4094     <t>in case the map(s) could be deleted</t>
4095     </list>
4096     </t>
4097     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
4098     <list>
4099     <t>when the given map does not exist</t>
4100     </list>
4101     </t>
4102     </list>
4103     </t>
4104    
4105     <t>Examples:</t>
4106     <t>
4107     <list>
4108     <t>C: "REMOVE MIDI_INSTRUMENT_MAP 0"</t>
4109     <t>S: "OK"</t>
4110     </list>
4111     </t>
4112     <t>
4113     <list>
4114     <t>C: "REMOVE MIDI_INSTRUMENT_MAP ALL"</t>
4115     <t>S: "OK"</t>
4116     </list>
4117     </t>
4118     </section>
4119    
4120     <section title="Get amount of existing MIDI instrument maps" anchor="GET MIDI_INSTRUMENT_MAPS">
4121     <t>The front-end can retrieve the current amount of MIDI
4122     instrument maps by sending the following command:</t>
4123     <t>
4124     <list>
4125     <t>GET MIDI_INSTRUMENT_MAPS</t>
4126     </list>
4127     </t>
4128    
4129     <t>Possible Answers:</t>
4130     <t>
4131     <list>
4132     <t>The sampler will answer by returning the current
4133     number of MIDI instrument maps.</t>
4134     </list>
4135     </t>
4136    
4137     <t>Example:</t>
4138     <t>
4139     <list>
4140     <t>C: "GET MIDI_INSTRUMENT_MAPS"</t>
4141     <t>S: "2"</t>
4142     </list>
4143     </t>
4144     </section>
4145    
4146     <section title="Getting all created MIDI instrument maps" anchor="LIST MIDI_INSTRUMENT_MAPS">
4147     <t>The number of MIDI instrument maps can change on runtime. To get the
4148     current list of MIDI instrument maps, the front-end can send the
4149     following command:</t>
4150     <t>
4151     <list>
4152     <t>LIST MIDI_INSTRUMENT_MAPS</t>
4153     </list>
4154     </t>
4155     <t>Possible Answers:</t>
4156     <t>
4157     <list>
4158     <t>The sampler will answer by returning a comma separated list
4159     with all MIDI instrument maps' numerical IDs.</t>
4160     </list>
4161     </t>
4162     <t>Example:</t>
4163     <t>
4164     <list>
4165     <t>C: "LIST MIDI_INSTRUMENT_MAPS"</t>
4166     <t>S: "0,1,5,12"</t>
4167     </list>
4168     </t>
4169     </section>
4170    
4171     <section title="Getting MIDI instrument map information" anchor="GET MIDI_INSTRUMENT_MAP INFO">
4172     <t>The front-end can ask for the current settings of a MIDI
4173     instrument map by sending the following command:</t>
4174     <t>
4175     <list>
4176     <t>GET MIDI_INSTRUMENT_MAP INFO &lt;map&gt;</t>
4177     </list>
4178     </t>
4179     <t>Where &lt;map&gt; is the numerical ID of the map the
4180     front-end is interested in as returned by the
4181     <xref target="LIST MIDI_INSTRUMENT_MAPS">"LIST MIDI_INSTRUMENT_MAPS"</xref>
4182     command.</t>
4183    
4184     <t>Possible Answers:</t>
4185     <t>
4186     <list>
4187     <t>LinuxSampler will answer by sending a &lt;CRLF&gt; separated list.
4188     Each answer line begins with the settings category name
4189     followed by a colon and then a space character &lt;SP&gt; and finally
4190     the info character string to that setting category. At the
4191     moment the following categories are defined:</t>
4192    
4193     <t>
4194     <list>
4195     <t>NAME -
4196     <list>
4197     <t>custom name of the given map,
4198     which does not have to be unique</t>
4199     </list>
4200     </t>
4201     </list>
4202     </t>
4203     </list>
4204     </t>
4205     <t>The mentioned fields above don't have to be in particular order.</t>
4206    
4207     <t>Example:</t>
4208     <t>
4209     <list>
4210     <t>C: "GET MIDI_INSTRUMENT_MAP INFO 0"</t>
4211     <t>S: "NAME: Standard Map"</t>
4212     <t>&nbsp;&nbsp;&nbsp;"."</t>
4213     </list>
4214     </t>
4215     </section>
4216    
4217     <section title="Renaming a MIDI instrument map" anchor="SET MIDI_INSTRUMENT_MAP NAME">
4218     <t>The front-end can alter the custom name of a MIDI
4219     instrument map by sending the following command:</t>
4220     <t>
4221     <list>
4222     <t>SET MIDI_INSTRUMENT_MAP NAME &lt;map&gt; &lt;name&gt;</t>
4223     </list>
4224     </t>
4225     <t>Where &lt;map&gt; is the numerical ID of the map and
4226     &lt;name&gt; the new custom name of the map, which does not
4227     have to be unique.</t>
4228    
4229     <t>Possible Answers:</t>
4230     <t>
4231     <list>
4232     <t>"OK" -
4233     <list>
4234     <t>on success</t>
4235     </list>
4236     </t>
4237     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
4238     <list>
4239     <t>in case the given map does not exist</t>
4240     </list>
4241     </t>
4242     </list>
4243     </t>
4244    
4245     <t>Example:</t>
4246     <t>
4247     <list>
4248     <t>C: "SET MIDI_INSTRUMENT_MAP NAME 0 'Foo instruments'"</t>
4249     <t>S: "OK"</t>
4250     </list>
4251     </t>
4252     </section>
4253    
4254 schoenebeck 944 <section title="Create or replace a MIDI instrument map entry" anchor="MAP MIDI_INSTRUMENT">
4255     <t>The front-end can create a new or replace an existing entry
4256 schoenebeck 973 in a sampler's MIDI instrument map by sending the following
4257 schoenebeck 944 command:</t>
4258     <t>
4259     <list>
4260 schoenebeck 973 <t>MAP MIDI_INSTRUMENT &lt;map&gt;
4261     &lt;midi_bank&gt; &lt;midi_prog&gt; &lt;engine_name&gt;
4262 schoenebeck 944 &lt;filename&gt; &lt;instrument_index&gt; &lt;volume_value&gt;
4263     [&lt;instr_load_mode&gt;] [&lt;name&gt;]</t>
4264     </list>
4265     </t>
4266 schoenebeck 973 <t>Where &lt;map&gt; is the numeric ID of the map to alter,
4267     &lt;midi_bank&gt; is an integer value between
4268     0..16383 reflecting the MIDI bank select index,
4269     &lt;midi_prog&gt; an
4270 schoenebeck 944 integer value between 0..127 reflecting the MIDI program change
4271     index, &lt;engine_name&gt; a sampler engine name as returned by
4272     the <xref target="LIST AVAILABLE_ENGINES">"LIST AVAILABLE_ENGINES"</xref>
4273     command (not encapsulated into apostrophes), &lt;filename&gt; the name
4274 schoenebeck 973 of the instrument's file to be deployed (encapsulated into apostrophes),
4275     &lt;instrument_index&gt; the index (integer value) of the instrument
4276 schoenebeck 944 within the given file, &lt;volume_value&gt; reflects the master
4277     volume of the instrument as optionally dotted number (where a
4278 schoenebeck 1026 value &lt; 1.0 means attenuation and a value > 1.0 means
4279 schoenebeck 944 amplification). This parameter easily allows to adjust the
4280     volume of all intruments within a custom instrument map
4281     without having to adjust their instrument files. The
4282     OPTIONAL &lt;instr_load_mode&gt; argument defines the life
4283     time of the instrument, that is when the instrument should
4284     be loaded, when freed and has exactly the following
4285     possibilities:</t>
4286     <t>
4287     <list>
4288     <t>"ON_DEMAND" -
4289     <list>
4290     <t>The instrument will be loaded when needed,
4291     that is when demanded by at least one sampler
4292     channel. It will immediately be freed from memory
4293     when not needed by any sampler channel anymore.</t>
4294     </list>
4295     </t>
4296     <t>"ON_DEMAND_HOLD" -
4297     <list>
4298     <t>The instrument will be loaded when needed,
4299     that is when demanded by at least one sampler
4300     channel. It will be kept in memory even when
4301     not needed by any sampler channel anymore.
4302     Instruments with this mode are only freed
4303     when the sampler is reset or all mapping
4304     entries with this mode (and respective
4305     instrument) are explicitly changed to
4306     "ON_DEMAND" and no sampler channel is using
4307     the instrument anymore.</t>
4308     </list>
4309     </t>
4310     <t>"PERSISTENT" -
4311     <list>
4312     <t>The instrument will immediately be loaded
4313     into memory in the background when this mapping
4314     command is sent and the instrument is kept all
4315     the time. Instruments with this mode are
4316     only freed when the sampler is reset or all
4317     mapping entries with this mode (and
4318     respective instrument) are explicitly
4319     changed to "ON_DEMAND" and no sampler
4320     channel is using the instrument anymore.</t>
4321     </list>
4322     </t>
4323     <t>not supplied -
4324     <list>
4325     <t>In case there is no &lt;instr_load_mode&gt;
4326     argument given, it will be up to the
4327     InstrumentManager to decide which mode to use.
4328     Usually it will use "ON_DEMAND" if an entry
4329     for the given instrument does not exist in
4330     the InstrumentManager's list yet, otherwise
4331     if an entry already exists, it will simply
4332     stick with the mode currently reflected by
4333     the already existing entry, that is it will
4334     not change the mode.</t>
4335     </list>
4336     </t>
4337     </list>
4338     </t>
4339     <t>
4340     The &lt;instr_load_mode&gt; argument thus allows to define an
4341     appropriate strategy (low memory consumption vs. fast
4342     instrument switching) for each instrument individually. Note, the
4343     following restrictions apply to this argument: "ON_DEMAND_HOLD" and
4344     "PERSISTENT" have to be supported by the respective sampler engine
4345     (which is technically the case when the engine provides an
4346     InstrumentManager for its format). If this is not the case the
4347     argument will automatically fall back to the default value
4348     "ON_DEMAND". Also the load mode of one instrument may
4349     automatically change the laod mode of other instrument(s), i.e.
4350     because the instruments are part of the same file and the
4351     engine does not allow a way to manage load modes for them
4352     individually. Due to this, in case the frontend shows the
4353     load modes of entries, the frontend should retrieve the actual
4354     mode by i.e. sending
4355     <xref target="GET MIDI_INSTRUMENT INFO">"GET MIDI_INSTRUMENT INFO"</xref>
4356     command(s). Finally the OPTIONAL &lt;name&gt; argument allows to
4357     set a custom name (encapsulated into apostrophes) for the mapping
4358     entry, useful for frontends for displaying an appropriate name for
4359     mapped instruments (using
4360     <xref target="GET MIDI_INSTRUMENT INFO">"GET MIDI_INSTRUMENT INFO"</xref>).
4361     </t>
4362     <t>
4363     The "MAP MIDI_INSTRUMENT" command
4364     will immediately return, thus it will not block when an
4365     instrument is to be loaded due to a "PERSISTENT" type
4366     entry as instruments are loaded in the background. As a
4367     consequence this command may not necessarily return an error
4368     i.e. when the given instrument file does not exist or may
4369     turn out to be corrupt.
4370     </t>
4371    
4372     <t>Possible Answers:</t>
4373     <t>
4374     <list>
4375     <t>"OK" -
4376     <list>
4377     <t>usually</t>
4378     </list>
4379     </t>
4380     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
4381     <list>
4382 schoenebeck 973 <t>when the given map or engine does not exist or a value
4383 schoenebeck 944 is out of range</t>
4384     </list>
4385     </t>
4386     </list>
4387     </t>
4388    
4389     <t>Examples:</t>
4390     <t>
4391     <list>
4392 schoenebeck 973 <t>C: "MAP MIDI_INSTRUMENT 0 3 0 gig '/usr/share/Steinway D.gig' 0 0.8 PERSISTENT"</t>
4393 schoenebeck 944 <t>S: "OK"</t>
4394     </list>
4395     </t>
4396     <t>
4397     <list>
4398 schoenebeck 973 <t>C: "MAP MIDI_INSTRUMENT 0 4 50 gig '/home/john/foostrings.gig' 7 1.0"</t>
4399 schoenebeck 944 <t>S: "OK"</t>
4400     </list>
4401     </t>
4402     <t>
4403     <list>
4404     <t>C: "MAP MIDI_INSTRUMENT 0 0 0 gig '/usr/share/piano.gig' 0 1.0 'Normal Piano'"</t>
4405     <t>S: "OK"</t>
4406 schoenebeck 973 <t>C: "MAP MIDI_INSTRUMENT 0 1 0 gig '/usr/share/piano.gig' 0 0.25 'Silent Piano'"</t>
4407 schoenebeck 944 <t>S: "OK"</t>
4408     </list>
4409     </t>
4410     <t>
4411     <list>
4412 schoenebeck 973 <t>C: "MAP MIDI_INSTRUMENT 1 8 120 gig '/home/joe/foodrums.gig' 0 1.0 PERSISTENT 'Foo Drumkit'"</t>
4413 schoenebeck 944 <t>S: "OK"</t>
4414     </list>
4415     </t>
4416     </section>
4417    
4418     <section title="Getting ammount of MIDI instrument map entries" anchor="GET MIDI_INSTRUMENTS">
4419 schoenebeck 973 <t>The front-end can query the amount of currently existing
4420     entries in a MIDI instrument map by sending the following
4421 schoenebeck 944 command:</t>
4422     <t>
4423     <list>
4424 schoenebeck 973 <t>GET MIDI_INSTRUMENTS &lt;map&gt;</t>
4425 schoenebeck 944 </list>
4426     </t>
4427 schoenebeck 973 <t>The front-end can query the amount of currently existing
4428     entries in all MIDI instrument maps by sending the following
4429     command:</t>
4430     <t>
4431     <list>
4432     <t>GET MIDI_INSTRUMENTS ALL</t>
4433     </list>
4434     </t>
4435 schoenebeck 944 <t>Possible Answers:</t>
4436     <t>
4437     <list>
4438 schoenebeck 973 <t>The sampler will answer by sending the current number of
4439     entries in the MIDI instrument map(s).</t>
4440 schoenebeck 944 </list>
4441     </t>
4442    
4443     <t>Example:</t>
4444     <t>
4445     <list>
4446 schoenebeck 973 <t>C: "GET MIDI_INSTRUMENTS 0"</t>
4447     <t>S: "234"</t>
4448 schoenebeck 944 </list>
4449     </t>
4450 schoenebeck 973 <t>
4451     <list>
4452     <t>C: "GET MIDI_INSTRUMENTS ALL"</t>
4453     <t>S: "954"</t>
4454     </list>
4455     </t>
4456 schoenebeck 944 </section>
4457    
4458 schoenebeck 973 <section title="Getting indeces of all entries of a MIDI instrument map" anchor="LIST MIDI_INSTRUMENTS">
4459     <t>The front-end can query a list of all currently existing
4460     entries in a certain MIDI instrument map by sending the following
4461     command:</t>
4462 schoenebeck 944 <t>
4463     <list>
4464 schoenebeck 973 <t>LIST MIDI_INSTRUMENTS &lt;map&gt;</t>
4465 schoenebeck 944 </list>
4466     </t>
4467 schoenebeck 973 <t>Where &lt;map&gt; is the numeric ID of the MIDI instrument map.</t>
4468     <t>The front-end can query a list of all currently existing
4469     entries of all MIDI instrument maps by sending the following
4470     command:</t>
4471     <t>
4472     <list>
4473     <t>LIST MIDI_INSTRUMENTS ALL</t>
4474     </list>
4475     </t>
4476    
4477 schoenebeck 944 <t>Possible Answers:</t>
4478     <t>
4479     <list>
4480 schoenebeck 973 <t>The sampler will answer by sending a comma separated
4481     list of map ID - MIDI bank - MIDI program triples, where
4482     each triple is encapsulated into curly braces. The
4483     list is returned in one single line. Each triple
4484     just reflects the key of the respective map entry,
4485     thus subsequent
4486 schoenebeck 944 <xref target="GET MIDI_INSTRUMENT INFO">"GET MIDI_INSTRUMENT INFO"</xref>
4487     command(s) are necessary to retrieve detailed informations
4488     about each entry.</t>
4489     </list>
4490     </t>
4491    
4492     <t>Example:</t>
4493     <t>
4494     <list>
4495 schoenebeck 973 <t>C: "LIST MIDI_INSTRUMENTS 0"</t>
4496     <t>S: "{0,0,0},{0,0,1},{0,0,3},{0,1,4},{1,127,127}"</t>
4497 schoenebeck 944 </list>
4498     </t>
4499     </section>
4500    
4501     <section title="Remove an entry from the MIDI instrument map" anchor="UNMAP MIDI_INSTRUMENT">
4502 schoenebeck 973 <t>The front-end can delete an entry from a MIDI instrument
4503 schoenebeck 944 map by sending the following command:</t>
4504     <t>
4505     <list>
4506 schoenebeck 973 <t>UNMAP MIDI_INSTRUMENT &lt;map&gt; &lt;midi_bank&gt; &lt;midi_prog&gt;</t>
4507 schoenebeck 944 </list>
4508     </t>
4509     <t>
4510 schoenebeck 973 Where &lt;map&gt; is the numeric ID of the MIDI instrument map,
4511     &lt;midi_bank&gt; is an integer value between 0..16383
4512     reflecting the MIDI bank value and
4513     &lt;midi_prog&gt; an integer value between
4514     0..127 reflecting the MIDI program value of the map's entrie's key
4515 schoenebeck 944 index triple.
4516     </t>
4517    
4518     <t>Possible Answers:</t>
4519     <t>
4520     <list>
4521     <t>"OK" -
4522     <list>
4523     <t>usually</t>
4524     </list>
4525     </t>
4526     <t>"ERR:&lt;error-code&gt;:&lt;error-message&gt;" -
4527     <list>
4528     <t>when index out of bounds</t>
4529     </list>
4530     </t>
4531     </list>
4532     </t>
4533    
4534     <t>Example:</t>
4535     <t>
4536     <list>
4537 schoenebeck 973 <t>C: "UNMAP MIDI_INSTRUMENT 0 2 127"</t>
4538 schoenebeck 944 <t>S: "OK"</t>
4539     </list>
4540     </t>
4541     </section>
4542    
4543     <section title="Get current settings of MIDI instrument map entry" anchor="GET MIDI_INSTRUMENT INFO">
4544     <t>The front-end can retrieve the current settings of a certain
4545     instrument map entry by sending the following command:</t>
4546     <t>
4547     <list>
4548 schoenebeck 973 <t>GET MIDI_INSTRUMENT INFO &lt;map&gt; &lt;midi_bank&gt; &lt;midi_prog&gt;</t>
4549 schoenebeck 944 </list>
4550     </t>
4551     <t>
4552 schoenebeck 973 Where &lt;map&gt; is the numeric ID of the MIDI instrument map,
4553     &lt;midi_bank&gt; is an integer value between 0..16383
4554     reflecting the MIDI bank value, &lt;midi_bank&gt;
4555     and &lt;midi_prog&gt; an integer value between
4556     0..127 reflecting the MIDI program value of the map's entrie's key
4557 schoenebeck 944 index triple.
4558     </t>
4559    
4560     <t>Possible Answers:</t>
4561     <t>
4562     <list>
4563     <t>LinuxSampler will answer by sending a &lt;CRLF&gt;
4564     separated list. Each answer line begins with the
4565     information category name followed by a colon and then
4566     a space character &lt;SP&gt; and finally the info
4567     character string to that info category. At the moment
4568     the following categories are defined:</t>
4569     <t>"NAME" -
4570     <list>
4571     <t>Name for this MIDI instrument map entry (if defined).
4572     This name shall be used by frontends for displaying a
4573     name for this mapped instrument. It can be set and
4574     changed with the
4575     <xref target="MAP MIDI_INSTRUMENT">"MAP MIDI_INSTRUMENT"</xref>
4576     command and does not have to be unique.</t>
4577     </list>
4578     </t>
4579     <t>"ENGINE_NAME" -
4580     <list>
4581     <t>Name of the engine to be deployed for this
4582     instrument.</t>
4583     </list>
4584     </t>
4585     <t>"INSTRUMENT_FILE" -
4586     <list>
4587     <t>File name of the instrument.</t>
4588     </list>
4589     </t>
4590     <t>"INSTRUMENT_NR" -
4591     <list>
4592     <t>Index of the instrument within the file.</t>
4593     </list>
4594     </t>
4595     <t>"INSTRUMENT_NAME" -
4596     <list>
4597     <t>Name of the loaded instrument as reflected by its file.
4598     In contrast to the "NAME" field, the "INSTRUMENT_NAME" field
4599     cannot be changed.</t>
4600     </list>
4601     </t>
4602     <t>"LOAD_MODE" -
4603     <list>
4604     <t>Life time of instrument
4605     (see <xref target="MAP MIDI_INSTRUMENT">"MAP MIDI_INSTRUMENT"</xref> for details about this setting).</t>
4606     </list>
4607     </t>
4608     <t>"VOLUME" -
4609     <list>
4610     <t>master volume of the instrument as optionally
4611 schoenebeck 1026 dotted number (where a value &lt; 1.0 means attenuation
4612 schoenebeck 944 and a value > 1.0 means amplification)</t>
4613     </list>
4614     </t>
4615     <t>The mentioned fields above don't have to be in particular order.</t>
4616     </list>
4617     </t>
4618    
4619     <t>Example:</t>
4620     <t>
4621     <list>
4622 schoenebeck 973 <t>C: "GET MIDI_INSTRUMENT INFO 1 45 120"</t>
4623 schoenebeck 944 <t>S: "NAME: Drums for Foo Song"</t>
4624     <t>&nbsp;&nbsp;&nbsp;"ENGINE_NAME: GigEngine"</t>
4625     <t>&nbsp;&nbsp;&nbsp;"INSTRUMENT_FILE: /usr/share/joesdrumkit.gig"</t>
4626     <t>&nbsp;&nbsp;&nbsp;"INSTRUMENT_NR: 0"</t>
4627     <t>&nbsp;&nbsp;&nbsp;"INSTRUMENT_NAME: Joe's Drumkit"</t>
4628     <t>&nbsp;&nbsp;&nbsp;"LOAD_MODE: PERSISTENT"</t>
4629     <t>&nbsp;&nbsp;&nbsp;"VOLUME: 1.0"</t>
4630     <t>&nbsp;&nbsp;&nbsp;"."</t>
4631     </list>
4632     </t>
4633     </section>
4634    
4635     <section title="Clear MIDI instrument map" anchor="CLEAR MIDI_INSTRUMENTS">
4636 schoenebeck 973 <t>The front-end can clear a whole MIDI instrument map, that
4637     is delete all its entries by sending the following command:</t>
4638 schoenebeck 944 <t>
4639     <list>
4640 schoenebeck 973 <t>CLEAR MIDI_INSTRUMENTS &lt;map&gt;</t>
4641 schoenebeck 944 </list>
4642     </t>
4643 schoenebeck 973 <t>Where &lt;map&gt; is the numeric ID of the map to clear.</t>
4644     <t>The front-end can clear all MIDI instrument maps, that
4645     is delete all entries of all maps by sending the following
4646     command:</t>
4647     <t>
4648     <list>
4649     <t>CLEAR MIDI_INSTRUMENTS ALL</t>
4650     </list>
4651     </t>
4652     <t>The command "CLEAR MIDI_INSTRUMENTS ALL" does not delete the
4653     maps, only their entries, thus the map's settings like
4654     custom name will be preservevd.</t>
4655 schoenebeck 944
4656     <t>Possible Answers:</t>
4657     <t>
4658     <list>
4659     <t>"OK" -
4660     <list>
4661     <t>always</t>
4662     </list>
4663     </t>
4664     </list>
4665     </t>
4666    
4667 schoenebeck 973 <t>Examples:</t>
4668 schoenebeck 944 <t>
4669     <list>
4670 schoenebeck 973 <t>C: "CLEAR MIDI_INSTRUMENTS 0"</t>
4671 schoenebeck 944 <t>S: "OK"</t>
4672     </list>
4673     </t>
4674 schoenebeck 973 <t>
4675     <list>
4676     <t>C: "CLEAR MIDI_INSTRUMENTS ALL"</t>
4677     <t>S: "OK"</t>
4678     </list>
4679     </t>
4680 schoenebeck 944 </section>
4681     </section>
4682    
4683 schoenebeck 151 </section>
4684    
4685 schoenebeck 944
4686 schoenebeck 534 <section title="Command Syntax" anchor="command_syntax">
4687 schoenebeck 573 <t>The grammar of the control protocol as descibed in <xref target="control_commands"/>
4688     is defined below using Backus-Naur Form (BNF as described in <xref target="RFC2234"/>)
4689     where applicable.
4690     </t>
4691     <!--
4692     This section is automatically generated by scripts/update_grammar.pl
4693     from src/network/lscp.y (yacc input file). Do not modify this section
4694     manually !
4695     -->
4696     <!-- GRAMMAR_BNF_BEGIN - do NOT delete or modify this line !!! -->
4697 schoenebeck 937
4698     <t>input =
4699     <list>
4700     <t>line LF
4701     </t>
4702     <t>/ line CR LF
4703     </t>
4704     </list>
4705     </t>
4706     <t>line =
4707     <list>
4708     <t>/* epsilon (empty line ignored) */
4709     </t>
4710     <t>/ comment
4711     </t>
4712     <t>/ command
4713     </t>
4714     <t>/ error
4715     </t>
4716     </list>
4717     </t>
4718     <t>comment =
4719     <list>
4720     <t>'#'
4721     </t>
4722     <t>/ comment '#'
4723     </t>
4724     <t>/ comment SP
4725     </t>
4726     <t>/ comment number
4727     </t>
4728     <t>/ comment string
4729     </t>
4730     </list>
4731     </t>
4732     <t>command =
4733     <list>
4734 schoenebeck 973 <t>ADD SP add_instruction
4735 schoenebeck 937 </t>
4736 schoenebeck 944 <t>/ MAP SP map_instruction
4737     </t>
4738     <t>/ UNMAP SP unmap_instruction
4739     </t>
4740 schoenebeck 937 <t>/ GET SP get_instruction
4741     </t>
4742     <t>/ CREATE SP create_instruction
4743     </t>
4744     <t>/ DESTROY SP destroy_instruction
4745     </t>
4746     <t>/ LIST SP list_instruction
4747     </t>
4748     <t>/ LOAD SP load_instruction
4749     </t>
4750 schoenebeck 944 <t>/ REMOVE SP remove_instruction
4751 schoenebeck 937 </t>
4752     <t>/ SET SP set_instruction
4753     </t>
4754     <t>/ SUBSCRIBE SP subscribe_event
4755     </t>
4756     <t>/ UNSUBSCRIBE SP unsubscribe_event
4757     </t>
4758     <t>/ SELECT SP text
4759     </t>
4760 schoenebeck 944 <t>/ RESET SP reset_instruction
4761 schoenebeck 937 </t>
4762 schoenebeck 944 <t>/ CLEAR SP clear_instruction
4763     </t>
4764 schoenebeck 937 <t>/ RESET
4765     </t>
4766     <t>/ QUIT
4767     </t>
4768     </list>
4769     </t>
4770 schoenebeck 973 <t>add_instruction =
4771     <list>
4772     <t>CHANNEL
4773     </t>
4774     <t>/ MIDI_INSTRUMENT_MAP
4775     </t>
4776     <t>/ MIDI_INSTRUMENT_MAP SP map_name
4777     </t>
4778     </list>
4779     </t>
4780 schoenebeck 937 <t>subscribe_event =
4781     <list>
4782 iliev 984 <t>AUDIO_OUTPUT_DEVICE_COUNT
4783 schoenebeck 937 </t>
4784 iliev 984 <t>/ AUDIO_OUTPUT_DEVICE_INFO
4785     </t>
4786     <t>/ MIDI_INPUT_DEVICE_COUNT
4787     </t>
4788     <t>/ MIDI_INPUT_DEVICE_INFO
4789     </t>
4790     <t>/ CHANNEL_COUNT
4791     </t>
4792 schoenebeck 937 <t>/ VOICE_COUNT
4793     </t>
4794     <t>/ STREAM_COUNT
4795     </t>
4796     <t>/ BUFFER_FILL
4797     </t>
4798     <t>/ CHANNEL_INFO
4799     </t>
4800 iliev 984 <t>/ MIDI_INSTRUMENT_MAP_COUNT
4801     </t>
4802     <t>/ MIDI_INSTRUMENT_MAP_INFO
4803     </t>
4804     <t>/ MIDI_INSTRUMENT_COUNT
4805     </t>
4806     <t>/ MIDI_INSTRUMENT_INFO
4807     </t>
4808 schoenebeck 937 <t>/ MISCELLANEOUS
4809     </t>
4810     <t>/ TOTAL_VOICE_COUNT
4811     </t>
4812     </list>
4813     </t>
4814     <t>unsubscribe_event =
4815     <list>
4816 iliev 984 <t>AUDIO_OUTPUT_DEVICE_COUNT
4817 schoenebeck 937 </t>
4818 iliev 984 <t>/ AUDIO_OUTPUT_DEVICE_INFO
4819     </t>
4820     <t>/ MIDI_INPUT_DEVICE_COUNT
4821     </t>
4822     <t>/ MIDI_INPUT_DEVICE_INFO
4823     </t>
4824     <t>/ CHANNEL_COUNT
4825     </t>
4826 schoenebeck 937 <t>/ VOICE_COUNT
4827     </t>
4828     <t>/ STREAM_COUNT
4829     </t>
4830     <t>/ BUFFER_FILL
4831     </t>
4832     <t>/ CHANNEL_INFO
4833     </t>
4834 iliev 984 <t>/ MIDI_INSTRUMENT_MAP_COUNT
4835     </t>
4836     <t>/ MIDI_INSTRUMENT_MAP_INFO
4837     </t>
4838     <t>/ MIDI_INSTRUMENT_COUNT
4839     </t>
4840     <t>/ MIDI_INSTRUMENT_INFO
4841     </t>
4842 schoenebeck 937 <t>/ MISCELLANEOUS
4843     </t>
4844     <t>/ TOTAL_VOICE_COUNT
4845     </t>
4846     </list>
4847     </t>
4848 schoenebeck 944 <t>map_instruction =
4849     <list>
4850 schoenebeck 973 <t>MIDI_INSTRUMENT SP midi_map SP midi_bank SP midi_prog SP engine_name SP filename SP instrument_index SP volume_value
4851 schoenebeck 944 </t>
4852 schoenebeck 973 <t>/ MIDI_INSTRUMENT SP midi_map SP midi_bank SP midi_prog SP engine_name SP filename SP instrument_index SP volume_value SP instr_load_mode
4853 schoenebeck 944 </t>
4854 schoenebeck 973 <t>/ MIDI_INSTRUMENT SP midi_map SP midi_bank SP midi_prog SP engine_name SP filename SP instrument_index SP volume_value SP entry_name
4855 schoenebeck 944 </t>
4856 schoenebeck 973 <t>/ MIDI_INSTRUMENT SP midi_map SP midi_bank SP midi_prog SP engine_name SP filename SP instrument_index SP volume_value SP instr_load_mode SP entry_name
4857 schoenebeck 944 </t>
4858     </list>
4859     </t>
4860     <t>unmap_instruction =
4861     <list>
4862 schoenebeck 973 <t>MIDI_INSTRUMENT SP midi_map SP midi_bank SP midi_prog
4863 schoenebeck 944 </t>
4864     </list>
4865     </t>
4866     <t>remove_instruction =
4867     <list>
4868     <t>CHANNEL SP sampler_channel
4869     </t>
4870 schoenebeck 973 <t>/ MIDI_INSTRUMENT_MAP SP midi_map
4871     </t>
4872     <t>/ MIDI_INSTRUMENT_MAP SP ALL
4873     </t>
4874 schoenebeck 944 </list>
4875     </t>
4876 schoenebeck 937 <t>get_instruction =
4877     <list>
4878     <t>AVAILABLE_ENGINES
4879     </t>
4880     <t>/ AVAILABLE_MIDI_INPUT_DRIVERS
4881     </t>
4882     <t>/ MIDI_INPUT_DRIVER SP INFO SP string
4883     </t>
4884     <t>/ MIDI_INPUT_DRIVER_PARAMETER SP INFO SP string SP string
4885     </t>
4886     <t>/ MIDI_INPUT_DRIVER_PARAMETER SP INFO SP string SP string SP key_val_list
4887     </t>
4888     <t>/ AVAILABLE_AUDIO_OUTPUT_DRIVERS
4889     </t>
4890     <t>/ AUDIO_OUTPUT_DRIVER SP INFO SP string
4891     </t>
4892     <t>/ AUDIO_OUTPUT_DRIVER_PARAMETER SP INFO SP string SP string
4893     </t>
4894     <t>/ AUDIO_OUTPUT_DRIVER_PARAMETER SP INFO SP string SP string SP key_val_list
4895     </t>
4896     <t>/ AUDIO_OUTPUT_DEVICES
4897     </t>
4898     <t>/ MIDI_INPUT_DEVICES
4899     </t>
4900     <t>/ AUDIO_OUTPUT_DEVICE SP INFO SP number
4901     </t>
4902     <t>/ MIDI_INPUT_DEVICE SP INFO SP number
4903     </t>
4904     <t>/ MIDI_INPUT_PORT SP INFO SP number SP number
4905     </t>
4906     <t>/ MIDI_INPUT_PORT_PARAMETER SP INFO SP number SP number SP string
4907     </t>
4908     <t>/ AUDIO_OUTPUT_CHANNEL SP INFO SP number SP number
4909     </t>
4910     <t>/ AUDIO_OUTPUT_CHANNEL_PARAMETER SP INFO SP number SP number SP string
4911     </t>
4912     <t>/ CHANNELS
4913     </t>
4914     <t>/ CHANNEL SP INFO SP sampler_channel
4915     </t>
4916     <t>/ CHANNEL SP BUFFER_FILL SP buffer_size_type SP sampler_channel
4917     </t>
4918     <t>/ CHANNEL SP STREAM_COUNT SP sampler_channel
4919     </t>
4920     <t>/ CHANNEL SP VOICE_COUNT SP sampler_channel
4921     </t>
4922     <t>/ ENGINE SP INFO SP engine_name
4923     </t>
4924     <t>/ SERVER SP INFO
4925     </t>
4926     <t>/ TOTAL_VOICE_COUNT
4927     </t>
4928     <t>/ TOTAL_VOICE_COUNT_MAX
4929     </t>
4930 schoenebeck 973 <t>/ MIDI_INSTRUMENTS SP midi_map
4931 schoenebeck 944 </t>
4932 schoenebeck 973 <t>/ MIDI_INSTRUMENTS SP ALL
4933 schoenebeck 944 </t>
4934 schoenebeck 973 <t>/ MIDI_INSTRUMENT SP INFO SP midi_map SP midi_bank SP midi_prog
4935     </t>
4936     <t>/ MIDI_INSTRUMENT_MAPS
4937     </t>
4938     <t>/ MIDI_INSTRUMENT_MAP SP INFO SP midi_map
4939     </t>
4940 schoenebeck 1001 <t>/ FX_SENDS SP sampler_channel
4941     </t>
4942     <t>/ FX_SEND SP INFO SP sampler_channel SP fx_send_id
4943     </t>
4944 schoenebeck 1005 <t>/ VOLUME
4945     </t>
4946 schoenebeck 937 </list>
4947     </t>
4948     <t>set_instruction =
4949     <list>
4950     <t>AUDIO_OUTPUT_DEVICE_PARAMETER SP number SP string '=' param_val_list
4951     </t>
4952     <t>/ AUDIO_OUTPUT_CHANNEL_PARAMETER SP number SP number SP string '=' param_val_list
4953     </t>
4954     <t>/ MIDI_INPUT_DEVICE_PARAMETER SP number SP string '=' param_val_list
4955     </t>
4956     <t>/ MIDI_INPUT_PORT_PARAMETER SP number SP number SP string '=' param_val_list
4957     </t>
4958     <t>/ CHANNEL SP set_chan_instruction
4959     </t>
4960 schoenebeck 973 <t>/ MIDI_INSTRUMENT_MAP SP NAME SP midi_map SP map_name
4961     </t>
4962 schoenebeck 1001 <t>/ FX_SEND SP AUDIO_OUTPUT_CHANNEL SP sampler_channel SP fx_send_id SP audio_channel_index SP audio_channel_index
4963     </t>
4964 schoenebeck 1026 <t>/ FX_SEND SP MIDI_CONTROLLER SP sampler_channel SP fx_send_id SP midi_ctrl
4965     </t>
4966     <t>/ FX_SEND SP LEVEL SP sampler_channel SP fx_send_id SP volume_value
4967     </t>
4968 schoenebeck 937 <t>/ ECHO SP boolean
4969     </t>
4970 schoenebeck 1005 <t>/ VOLUME SP volume_value
4971     </t>
4972 schoenebeck 937 </list>
4973     </t>
4974     <t>create_instruction =
4975     <list>
4976     <t>AUDIO_OUTPUT_DEVICE SP string SP key_val_list
4977     </t>
4978     <t>/ AUDIO_OUTPUT_DEVICE SP string
4979     </t>
4980     <t>/ MIDI_INPUT_DEVICE SP string SP key_val_list
4981     </t>
4982     <t>/ MIDI_INPUT_DEVICE SP string
4983     </t>
4984 schoenebeck 1001 <t>/ FX_SEND SP sampler_channel SP midi_ctrl
4985     </t>
4986     <t>/ FX_SEND SP sampler_channel SP midi_ctrl SP fx_send_name
4987     </t>
4988 schoenebeck 937 </list>
4989     </t>
4990 schoenebeck 944 <t>reset_instruction =
4991     <list>
4992     <t>CHANNEL SP sampler_channel
4993     </t>
4994     </list>
4995     </t>
4996     <t>clear_instruction =
4997     <list>
4998 schoenebeck 973 <t>MIDI_INSTRUMENTS SP midi_map
4999 schoenebeck 944 </t>
5000 schoenebeck 973 <t>/ MIDI_INSTRUMENTS SP ALL
5001     </t>
5002 schoenebeck 944 </list>
5003     </t>
5004 schoenebeck 937 <t>destroy_instruction =
5005     <list>
5006     <t>AUDIO_OUTPUT_DEVICE SP number
5007     </t>
5008     <t>/ MIDI_INPUT_DEVICE SP number
5009     </t>
5010 schoenebeck 1001 <t>/ FX_SEND SP sampler_channel SP fx_send_id
5011     </t>
5012 schoenebeck 937 </list>
5013     </t>
5014     <t>load_instruction =
5015     <list>
5016     <t>INSTRUMENT SP load_instr_args
5017     </t>
5018     <t>/ ENGINE SP load_engine_args
5019     </t>
5020     </list>
5021     </t>
5022     <t>set_chan_instruction =
5023     <list>
5024     <t>AUDIO_OUTPUT_DEVICE SP sampler_channel SP device_index
5025     </t>
5026     <t>/ AUDIO_OUTPUT_CHANNEL SP sampler_channel SP audio_channel_index SP audio_channel_index
5027     </t>
5028     <t>/ AUDIO_OUTPUT_TYPE SP sampler_channel SP audio_output_type_name
5029     </t>
5030     <t>/ MIDI_INPUT SP sampler_channel SP device_index SP midi_input_port_index SP midi_input_channel_index
5031     </t>
5032     <t>/ MIDI_INPUT_DEVICE SP sampler_channel SP device_index
5033     </t>
5034     <t>/ MIDI_INPUT_PORT SP sampler_channel SP midi_input_port_index
5035     </t>
5036     <t>/ MIDI_INPUT_CHANNEL SP sampler_channel SP midi_input_channel_index
5037     </t>
5038     <t>/ MIDI_INPUT_TYPE SP sampler_channel SP midi_input_type_name
5039     </t>
5040     <t>/ VOLUME SP sampler_channel SP volume_value
5041     </t>
5042     <t>/ MUTE SP sampler_channel SP boolean
5043     </t>
5044     <t>/ SOLO SP sampler_channel SP boolean
5045     </t>
5046 schoenebeck 973 <t>/ MIDI_INSTRUMENT_MAP SP sampler_channel SP midi_map
5047     </t>
5048     <t>/ MIDI_INSTRUMENT_MAP SP sampler_channel SP NONE
5049     </t>
5050     <t>/ MIDI_INSTRUMENT_MAP SP sampler_channel SP DEFAULT
5051     </t>
5052 schoenebeck 937 </list>
5053     </t>
5054     <t>key_val_list =
5055     <list>
5056     <t>string '=' param_val_list
5057     </t>
5058     <t>/ key_val_list SP string '=' param_val_list
5059     </t>
5060     </list>
5061     </t>
5062     <t>buffer_size_type =
5063     <list>
5064     <t>BYTES
5065     </t>
5066     <t>/ PERCENTAGE
5067     </t>
5068     </list>
5069     </t>
5070     <t>list_instruction =
5071     <list>
5072     <t>AUDIO_OUTPUT_DEVICES
5073     </t>
5074     <t>/ MIDI_INPUT_DEVICES
5075     </t>
5076     <t>/ CHANNELS
5077     </t>
5078     <t>/ AVAILABLE_ENGINES
5079     </t>
5080     <t>/ AVAILABLE_MIDI_INPUT_DRIVERS
5081     </t>
5082     <t>/ AVAILABLE_AUDIO_OUTPUT_DRIVERS
5083     </t>
5084 schoenebeck 973 <t>/ MIDI_INSTRUMENTS SP midi_map
5085 schoenebeck 944 </t>
5086 schoenebeck 973 <t>/ MIDI_INSTRUMENTS SP ALL
5087     </t>
5088     <t>/ MIDI_INSTRUMENT_MAPS
5089     </t>
5090 schoenebeck 1001 <t>/ FX_SENDS SP sampler_channel
5091     </t>
5092 schoenebeck 937 </list>
5093     </t>
5094     <t>load_instr_args =
5095     <list>
5096     <t>filename SP instrument_index SP sampler_channel
5097     </t>
5098     <t>/ NON_MODAL SP filename SP instrument_index SP sampler_channel
5099     </t>
5100     </list>
5101     </t>
5102     <t>load_engine_args =
5103     <list>
5104     <t>engine_name SP sampler_channel
5105     </t>
5106     </list>
5107     </t>
5108 schoenebeck 944 <t>instr_load_mode =
5109     <list>
5110     <t>ON_DEMAND
5111     </t>
5112     <t>/ ON_DEMAND_HOLD
5113     </t>
5114     <t>/ PERSISTENT
5115     </t>
5116     </list>
5117     </t>
5118 schoenebeck 937 <t>device_index =
5119     <list>
5120     <t>number
5121     </t>
5122     </list>
5123     </t>
5124     <t>audio_channel_index =
5125     <list>
5126     <t>number
5127     </t>
5128     </list>
5129     </t>
5130     <t>audio_output_type_name =
5131     <list>
5132     <t>string
5133     </t>
5134     </list>
5135     </t>
5136     <t>midi_input_port_index =
5137     <list>
5138     <t>number
5139     </t>
5140     </list>
5141     </t>
5142     <t>midi_input_channel_index =
5143     <list>
5144     <t>number
5145     </t>
5146     <t>/ ALL
5147     </t>
5148     </list>
5149     </t>
5150     <t>midi_input_type_name =
5151     <list>
5152     <t>string
5153     </t>
5154     </list>
5155     </t>
5156 schoenebeck 973 <t>midi_map =
5157 schoenebeck 944 <list>
5158     <t>number
5159     </t>
5160     </list>
5161     </t>
5162 schoenebeck 973 <t>midi_bank =
5163 schoenebeck 944 <list>
5164     <t>number
5165     </t>
5166     </list>
5167     </t>
5168     <t>midi_prog =
5169     <list>
5170     <t>number
5171     </t>
5172     </list>
5173     </t>
5174 schoenebeck 1001 <t>midi_ctrl =
5175     <list>
5176     <t>number
5177     </t>
5178     </list>
5179     </t>
5180 schoenebeck 937 <t>volume_value =
5181     <list>
5182     <t>dotnum
5183     </t>
5184     <t>/ number
5185     </t>
5186     </list>
5187     </t>
5188     <t>sampler_channel =
5189     <list>
5190     <t>number
5191     </t>
5192     </list>
5193     </t>
5194     <t>instrument_index =
5195     <list>
5196     <t>number
5197     </t>
5198     </list>
5199     </t>
5200 schoenebeck 1001 <t>fx_send_id =
5201     <list>
5202     <t>number
5203     </t>
5204     </list>
5205     </t>
5206 schoenebeck 937 <t>engine_name =
5207     <list>
5208     <t>string
5209     </t>
5210     </list>
5211     </t>
5212     <t>filename =
5213     <list>
5214     <t>stringval
5215     </t>
5216     </list>
5217     </t>
5218 schoenebeck 973 <t>map_name =
5219     <list>
5220     <t>stringval
5221     </t>
5222     </list>
5223     </t>
5224 schoenebeck 944 <t>entry_name =
5225     <list>
5226     <t>stringval
5227     </t>
5228     </list>
5229     </t>
5230 schoenebeck 1001 <t>fx_send_name =
5231     <list>
5232     <t>stringval
5233     </t>
5234     </list>
5235     </t>
5236 schoenebeck 937 <t>param_val_list =
5237     <list>
5238     <t>param_val
5239     </t>
5240     <t>/ param_val_list','param_val
5241     </t>
5242     </list>
5243     </t>
5244     <t>param_val =
5245     <list>
5246     <t>string
5247     </t>
5248     <t>/ stringval
5249     </t>
5250     <t>/ number
5251     </t>
5252     <t>/ dotnum
5253     </t>
5254     </list>
5255     </t>
5256    
5257 schoenebeck 573 <!-- GRAMMAR_BNF_END - do NOT delete or modify this line !!! -->
5258 schoenebeck 151 </section>
5259    
5260 schoenebeck 534 <section title="Events" anchor="events">
5261 schoenebeck 151 <t>This chapter will describe all currently defined events supported by LinuxSampler.</t>
5262    
5263 iliev 981 <section title="Number of audio output devices changed" anchor="SUBSCRIBE AUDIO_OUTPUT_DEVICE_COUNT">
5264     <t>Client may want to be notified when the total number of audio output devices on the
5265     back-end changes by issuing the following command:</t>
5266     <t>
5267     <list>
5268     <t>SUBSCRIBE AUDIO_OUTPUT_DEVICE_COUNT</t>
5269     </list>
5270     </t>
5271     <t>Server will start sending the following notification messages:</t>
5272     <t>
5273     <list>
5274     <t>"NOTIFY:AUDIO_OUTPUT_DEVICE_COUNT:&lt;devices&gt;"</t>
5275     </list>
5276     </t>
5277     <t>where &lt;devices&gt; will be replaced by the new number
5278     of audio output devices.</t>
5279     </section>
5280    
5281     <section title="Audio output device's settings changed" anchor="SUBSCRIBE AUDIO_OUTPUT_DEVICE_INFO">
5282     <t>Client may want to be notified when changes were made to audio output devices on the
5283     back-end by issuing the following command:</t>
5284     <t>
5285     <list>
5286     <t>SUBSCRIBE AUDIO_OUTPUT_DEVICE_INFO</t>
5287     </list>
5288     </t>
5289     <t>Server will start sending the following notification messages:</t>
5290     <t>
5291     <list>
5292     <t>"NOTIFY:AUDIO_OUTPUT_DEVICE_INFO:&lt;device-id&gt;"</t>
5293     </list>
5294     </t>
5295     <t>where &lt;device-id&gt; will be replaced by the numerical ID of the audio output device,
5296     which settings has been changed. The front-end will have to send
5297     the respective command to actually get the audio output device info. Because these messages
5298     will be triggered by LSCP commands issued by other clients rather than real
5299     time events happening on the server, it is believed that an empty notification
5300     message is sufficient here.</t>
5301     </section>
5302    
5303     <section title="Number of MIDI input devices changed" anchor="SUBSCRIBE MIDI_INPUT_DEVICE_COUNT">
5304     <t>Client may want to be notified when the total number of MIDI input devices on the
5305     back-end changes by issuing the following command:</t>
5306     <t>
5307     <list>
5308     <t>SUBSCRIBE MIDI_INPUT_DEVICE_COUNT</t>
5309     </list>
5310     </t>
5311     <t>Server will start sending the following notification messages:</t>
5312     <t>
5313     <list>
5314     <t>"NOTIFY:MIDI_INPUT_DEVICE_COUNT:&lt;devices&gt;"</t>
5315     </list>
5316     </t>
5317     <t>where &lt;devices&gt; will be replaced by the new number
5318     of MIDI input devices.</t>
5319     </section>
5320    
5321     <section title="MIDI input device's settings changed" anchor="SUBSCRIBE MIDI_INPUT_DEVICE_INFO">
5322     <t>Client may want to be notified when changes were made to MIDI input devices on the
5323     back-end by issuing the following command:</t>
5324     <t>
5325     <list>
5326     <t>SUBSCRIBE MIDI_INPUT_DEVICE_INFO</t>
5327     </list>
5328     </t>
5329     <t>Server will start sending the following notification messages:</t>
5330     <t>
5331     <list>
5332     <t>"NOTIFY:MIDI_INPUT_DEVICE_INFO:&lt;device-id&gt;"</t>
5333     </list>
5334     </t>
5335     <t>where &lt;device-id&gt; will be replaced by the numerical ID of the MIDI input device,
5336     which settings has been changed. The front-end will have to send
5337     the respective command to actually get the MIDI input device info. Because these messages
5338     will be triggered by LSCP commands issued by other clients rather than real
5339     time events happening on the server, it is believed that an empty notification
5340     message is sufficient here.</t>
5341     </section>
5342    
5343     <section title="Number of sampler channels changed" anchor="SUBSCRIBE CHANNEL_COUNT">
5344 schoenebeck 151 <t>Client may want to be notified when the total number of channels on the
5345     back-end changes by issuing the following command:</t>
5346     <t>
5347     <list>
5348 schoenebeck 556 <t>SUBSCRIBE CHANNEL_COUNT</t>
5349 schoenebeck 151 </list>
5350     </t>
5351     <t>Server will start sending the following notification messages:</t>
5352     <t>
5353     <list>
5354 schoenebeck 556 <t>"NOTIFY:CHANNEL_COUNT:&lt;channels&gt;"</t>
5355 schoenebeck 151 </list>
5356     </t>
5357     <t>where &lt;channels&gt; will be replaced by the new number
5358     of sampler channels.</t>
5359     </section>
5360    
5361 schoenebeck 534 <section title="Number of active voices changed" anchor="SUBSCRIBE VOICE_COUNT">
5362 schoenebeck 151 <t>Client may want to be notified when the number of voices on the
5363     back-end changes by issuing the following command:</t>
5364     <t>
5365     <list>
5366     <t>SUBSCRIBE VOICE_COUNT</t>
5367     </list>
5368     </t>
5369     <t>Server will start sending the following notification messages:</t>
5370     <t>
5371     <list>
5372 schoenebeck 499 <t>"NOTIFY:VOICE_COUNT:&lt;sampler-channel&gt; &lt;voices&gt;</t>
5373 schoenebeck 151 </list>
5374     </t>
5375     <t>where &lt;sampler-channel&gt; will be replaced by the sampler channel the
5376 schoenebeck 499 voice count change occurred and &lt;voices&gt; by the new number of
5377 schoenebeck 151 active voices on that channel.</t>
5378     </section>
5379    
5380 schoenebeck 534 <section title="Number of active disk streams changed" anchor="SUBSCRIBE STREAM_COUNT">
5381 schoenebeck 151 <t>Client may want to be notified when the number of streams on the back-end
5382     changes by issuing the following command: SUBSCRIBE STREAM_COUNT</t>
5383     <t>
5384     <list>
5385     <t>SUBSCRIBE STREAM_COUNT</t>
5386     </list>
5387     </t>
5388     <t>Server will start sending the following notification messages:</t>
5389     <t>
5390     <list>
5391     <t>"NOTIFY:STREAM_COUNT:&lt;sampler-channel&gt; &lt;streams&gt;"</t>
5392     </list>
5393     </t>
5394     <t>where &lt;sampler-channel&gt; will be replaced by the sampler channel the
5395     stream count change occurred and &lt;streams&gt; by the new number of
5396     active disk streams on that channel.</t>
5397     </section>
5398    
5399 schoenebeck 534 <section title="Disk stream buffer fill state changed" anchor="SUBSCRIBE BUFFER_FILL">
5400 schoenebeck 499 <t>Client may want to be notified when the buffer fill state of a disk stream
5401     on the back-end changes by issuing the following command:</t>
5402 schoenebeck 151 <t>
5403     <list>
5404     <t>SUBSCRIBE BUFFER_FILL</t>
5405     </list>
5406     </t>
5407     <t>Server will start sending the following notification messages:</t>
5408     <t>
5409     <list>
5410     <t>"NOTIFY:BUFFER_FILL:&lt;sampler-channel&gt; &lt;fill-data&gt;"</t>
5411     </list>
5412     </t>
5413     <t>where &lt;sampler-channel&gt; will be replaced by the sampler channel the
5414 schoenebeck 534 buffer fill state change occurred on and &lt;fill-data&gt; will be replaced by the
5415     buffer fill data for this channel as described in <xref target="GET CHANNEL BUFFER_FILL" />
5416     as if the <xref target="GET CHANNEL BUFFER_FILL">
5417     "GET CHANNEL BUFFER_FILL PERCENTAGE"</xref> command was issued on this channel.</t>
5418 schoenebeck 151 </section>
5419    
5420 iliev 981 <section title="Channel information changed" anchor="SUBSCRIBE CHANNEL_INFO">
5421 schoenebeck 151 <t>Client may want to be notified when changes were made to sampler channels on the
5422 schoenebeck 561 back-end by issuing the following command:</t>
5423 schoenebeck 151 <t>
5424     <list>
5425 schoenebeck 556 <t>SUBSCRIBE CHANNEL_INFO</t>
5426 schoenebeck 151 </list>
5427     </t>
5428     <t>Server will start sending the following notification messages:</t>
5429     <t>
5430     <list>
5431 schoenebeck 556 <t>"NOTIFY:CHANNEL_INFO:&lt;sampler-channel&gt;"</t>
5432 schoenebeck 151 </list>
5433     </t>
5434     <t>where &lt;sampler-channel&gt; will be replaced by the sampler channel the
5435     channel info change occurred. The front-end will have to send
5436     the respective command to actually get the channel info. Because these messages
5437     will be triggered by LSCP commands issued by other clients rather than real
5438     time events happening on the server, it is believed that an empty notification
5439     message is sufficient here.</t>
5440     </section>
5441    
5442 iliev 778 <section title="Total number of active voices changed" anchor="SUBSCRIBE TOTAL_VOICE_COUNT">
5443     <t>Client may want to be notified when the total number of voices on the
5444     back-end changes by issuing the following command:</t>
5445     <t>
5446     <list>
5447     <t>SUBSCRIBE TOTAL_VOICE_COUNT</t>
5448     </list>
5449     </t>
5450     <t>Server will start sending the following notification messages:</t>
5451     <t>
5452     <list>
5453     <t>"NOTIFY:TOTAL_VOICE_COUNT:&lt;voices&gt;</t>
5454     </list>
5455     </t>
5456     <t>where &lt;voices&gt; will be replaced by the new number of
5457     all currently active voices.</t>
5458     </section>
5459    
5460 iliev 981 <section title="Number of MIDI instrument maps changed" anchor="SUBSCRIBE MIDI_INSTRUMENT_MAP_COUNT">
5461     <t>Client may want to be notified when the number of MIDI instrument maps on the
5462     back-end changes by issuing the following command:</t>
5463     <t>
5464     <list>
5465     <t>SUBSCRIBE MIDI_INSTRUMENT_MAP_COUNT</t>
5466     </list>
5467     </t>
5468     <t>Server will start sending the following notification messages:</t>
5469     <t>
5470     <list>
5471     <t>"NOTIFY:MIDI_INSTRUMENT_MAP_COUNT:&lt;maps&gt;"</t>
5472     </list>
5473     </t>
5474     <t>where &lt;maps&gt; will be replaced by the new number
5475     of MIDI instrument maps.</t>
5476     </section>
5477    
5478     <section title="MIDI instrument map information changed" anchor="SUBSCRIBE MIDI_INSTRUMENT_MAP_INFO">
5479     <t>Client may want to be notified when changes were made to MIDI instrument maps on the
5480     back-end by issuing the following command:</t>
5481     <t>
5482     <list>
5483     <t>SUBSCRIBE MIDI_INSTRUMENT_MAP_INFO</t>
5484     </list>
5485     </t>
5486     <t>Server will start sending the following notification messages:</t>
5487     <t>
5488     <list>
5489     <t>"NOTIFY:MIDI_INSTRUMENT_MAP_INFO:&lt;map-id&gt;"</t>
5490     </list>
5491     </t>
5492     <t>where &lt;map-id&gt; will be replaced by the numerical ID of the MIDI instrument map,
5493     for which information changes occurred. The front-end will have to send
5494     the respective command to actually get the MIDI instrument map info. Because these messages
5495     will be triggered by LSCP commands issued by other clients rather than real
5496     time events happening on the server, it is believed that an empty notification
5497     message is sufficient here.</t>
5498     </section>
5499    
5500     <section title="Number of MIDI instruments changed" anchor="SUBSCRIBE MIDI_INSTRUMENT_COUNT">
5501     <t>Client may want to be notified when the number of MIDI instrument maps on the
5502     back-end changes by issuing the following command:</t>
5503     <t>
5504     <list>
5505     <t>SUBSCRIBE MIDI_INSTRUMENT_COUNT</t>
5506     </list>
5507     </t>
5508     <t>Server will start sending the following notification messages:</t>
5509     <t>
5510     <list>
5511     <t>"NOTIFY:MIDI_INSTRUMENT_COUNT:&lt;map-id&gt; &lt;instruments&gt;"</t>
5512     </list>
5513     </t>
5514 iliev 984 <t>where &lt;map-id&gt; is the numerical ID of the MIDI instrument map, in which
5515 iliev 981 the nuber of instruments has changed and &lt;instruments&gt; will be replaced by
5516     the new number of MIDI instruments in the specified map.</t>
5517     </section>
5518    
5519     <section title="MIDI instrument information changed" anchor="SUBSCRIBE MIDI_INSTRUMENT_INFO">
5520     <t>Client may want to be notified when changes were made to MIDI instruments on the
5521     back-end by issuing the following command:</t>
5522     <t>
5523     <list>
5524     <t>SUBSCRIBE MIDI_INSTRUMENT_INFO</t>
5525     </list>
5526     </t>
5527     <t>Server will start sending the following notification messages:</t>
5528     <t>
5529     <list>
5530     <t>"NOTIFY:MIDI_INSTRUMENT_INFO:&lt;map-id&gt; &lt;bank&gt; &lt;program&gt;"</t>
5531     </list>
5532     </t>
5533     <t>where &lt;map-id&gt; will be replaced by the numerical ID of the MIDI instrument map,
5534 iliev 984 in which a MIDI instrument is changed. &lt;bank&gt; and &lt;program&gt; specifies
5535 iliev 981 the location of the changed MIDI instrument in the map. The front-end will have to send
5536     the respective command to actually get the MIDI instrument info. Because these messages
5537     will be triggered by LSCP commands issued by other clients rather than real
5538     time events happening on the server, it is believed that an empty notification
5539     message is sufficient here.</t>
5540     </section>
5541    
5542 iliev 991 <section title="Miscellaneous and debugging events" anchor="SUBSCRIBE MISCELLANEOUS">
5543 schoenebeck 151 <t>Client may want to be notified of miscellaneous and debugging events occurring at
5544     the server by issuing the following command:</t>
5545     <t>
5546     <list>
5547     <t>SUBSCRIBE MISCELLANEOUS</t>
5548     </list>
5549     </t>
5550     <t>Server will start sending the following notification messages:</t>
5551     <t>
5552     <list>
5553     <t>"NOTIFY:MISCELLANEOUS:&lt;string&gt;"</t>
5554     </list>
5555     </t>
5556     <t>where &lt;string&gt; will be replaced by whatever data server
5557     wants to send to the client. Client MAY display this data to the
5558     user AS IS to facilitate debugging.</t>
5559     </section>
5560     </section>
5561    
5562     <section title="Security Considerations">
5563     <t>As there is so far no method of authentication and authorization
5564     defined and so not required for a client applications to succeed to
5565     connect, running LinuxSampler might be a security risk for the host
5566     system the LinuxSampler instance is running on.</t>
5567     </section>
5568    
5569     <section title="Acknowledgments">
5570     <t>This document has benefited greatly from the comments of the
5571     following people, discussed on the LinuxSampler developer's mailing
5572     list:</t>
5573     <t>
5574     <list>
5575     <t>Rui Nuno Capela</t>
5576     <t>Vladimir Senkov</t>
5577     <t>Mark Knecht</t>
5578 schoenebeck 561 <t>Grigor Iliev</t>
5579 schoenebeck 151 </list>
5580     </t>
5581     </section>
5582    
5583     </middle>
5584    
5585     <back>
5586 schoenebeck 571 <references>
5587     <reference anchor="RFC2119">
5588     <front>
5589     <title>Key words for use in RFCs to Indicate Requirement Levels</title>
5590     <author initials="S." surname="Bradner" fullname="Scott Bradner">
5591     <organization>Harvard University</organization>
5592     </author>
5593     <date year="1997"></date>
5594     </front>
5595     <seriesInfo name="RFC" value="2119" />
5596     </reference>
5597     <reference anchor="RFC793">
5598     <front>
5599     <title>TRANSMISSION CONTROL PROTOCOL</title>
5600     <author>
5601     <organization>Defense Advanced Research Projects Agency</organization>
5602     </author>
5603     <date year="1981"></date>
5604     </front>
5605     <seriesInfo name="RFC" value="793" />
5606     </reference>
5607 schoenebeck 573 <reference anchor="RFC2234">
5608     <front>
5609     <title>Augmented BNF for Syntax Specifications</title>
5610     <author initials="D.H." surname="Crocker" fullname="David H. Crocker">
5611     <organization>Internet Mail Consortium</organization>
5612     </author>
5613     <author initials="P." surname="Overell" fullname="Paul Overell">
5614     <organization>Demon Internet Ltd</organization>
5615     </author>
5616     <date year="1997"></date>
5617     </front>
5618     <seriesInfo name="RFC" value="2234" />
5619     </reference>
5620 schoenebeck 571 </references>
5621 schoenebeck 151 </back>
5622    
5623     </rfc>

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