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* NKSP: added min() and max() functions.

1 schoenebeck 2732 <html>
2     <head>
3     <meta name="author" content="Christian Schoenebeck">
4     <title>NKSP Reference</title>
5     <urlpath>Reference</urlpath>
6     <navpath>Reference Manual</navpath>
7     <meta name="description" content="Reference documentation of the NKSP real-time instrument script language.">
8     </head>
9     <body>
10     <h1>NKSP Reference</h1>
11     <p>
12     This document gives you an overview of all built-in functions and built-in
13     variables provided by the NKSP real-time instrument script language.
14     </p>
15    
16     <h2>Built-In Functions</h2>
17     <p>
18     These are the built-in functions available with the NKSP realt-time
19     instrument script language.
20     </p>
21    
22     <h3>Core Language Functions</h3>
23     <p>
24     Most fundamental NKSP functions, independent from any purpose of being used in a sampler.
25     </p>
26     <table>
27     <tr>
28     <th>Function</th> <th>Description</th>
29     </tr>
30     <tr>
31 schoenebeck 2946 <td><code lang="nksp">dec()</code></td>
32     <td>Decrements the passed integer variable by one.</td>
33     </tr>
34     <tr>
35     <td><code>inc()</code></td>
36     <td>Increments the passed integer variable by one.</td>
37     </tr>
38     <tr>
39 schoenebeck 2742 <td><code lang="nksp">message()</code></td>
40 schoenebeck 2732 <td>Prints text to the sampler's terminal.</td>
41     </tr>
42     <tr>
43     <td><code>exit()</code></td>
44     <td>Stops execution of the current event handler instance.</td>
45     </tr>
46     <tr>
47     <td><code>wait()</code></td>
48     <td>Pauses execution for a certain amount of time.</td>
49     </tr>
50     <tr>
51 schoenebeck 2949 <td><code>stop_wait()</code></td>
52     <td>Resumes execution of a suspended script callback.</td>
53     </tr>
54     <tr>
55 schoenebeck 2732 <td><code>abs()</code></td>
56     <td>Calculates the absolute value of a given value.</td>
57     </tr>
58     <tr>
59     <td><code>random()</code></td>
60     <td>Random number generator.</td>
61     </tr>
62     <tr>
63 schoenebeck 2971 <td><code>min()</code></td>
64     <td>Calculates the minimum value of two given values.</td>
65     </tr>
66     <tr>
67     <td><code>max()</code></td>
68     <td>Calculates the maximum value of two given values.</td>
69     </tr>
70     <tr>
71 schoenebeck 2732 <td><code>num_elements()</code></td>
72     <td>Returns the size of the requested array variable.</td>
73     </tr>
74 schoenebeck 2966 <tr>
75     <td><code>sh_left()</code></td>
76     <td>Calculates a left bit shifted value.</td>
77     </tr>
78     <tr>
79     <td><code>sh_right()</code></td>
80     <td>Calculates a right bit shifted value.</td>
81     </tr>
82 schoenebeck 2732 </table>
83    
84     <h3>Common Sampler Functions</h3>
85     <p>
86     Basic sampler related functions, independent from a particular sampler
87     format or sampler engine.
88     </p>
89     <table>
90     <tr>
91     <th>Function</th> <th>Description</th>
92     </tr>
93     <tr>
94     <td><code>play_note()</code></td>
95     <td>Triggers a new note.</td>
96     </tr>
97     <tr>
98 schoenebeck 2932 <td><code>change_pan()</code></td>
99     <td>Changes panning of voices (stereo balance).</td>
100     </tr>
101     <tr>
102     <td><code>change_tune()</code></td>
103     <td>Changes the tuning of voices.</td>
104     </tr>
105     <tr>
106     <td><code>change_vol()</code></td>
107     <td>Changes the volume of voices.</td>
108     </tr>
109     <tr>
110 schoenebeck 2936 <td><code>change_cutoff()</code></td>
111     <td>Changes filter cutoff frequency of voices.</td>
112     </tr>
113     <tr>
114     <td><code>change_reso()</code></td>
115     <td>Changes filter resonance of voices.</td>
116     </tr>
117     <tr>
118 schoenebeck 2954 <td><code>change_attack()</code></td>
119     <td>Modifies the attack time of voices.</td>
120     </tr>
121     <tr>
122     <td><code>change_decay()</code></td>
123     <td>Modifies the decay time of voices.</td>
124     </tr>
125     <tr>
126     <td><code>change_release()</code></td>
127     <td>Modifies the release time of voices.</td>
128     </tr>
129     <tr>
130 schoenebeck 2936 <td><code>event_status()</code></td>
131     <td>Checks and returns whether a particular note is still alive.</td>
132     </tr>
133     <tr>
134 schoenebeck 2732 <td><code>set_controller()</code></td>
135     <td>Creates a MIDI control change event.</td>
136     </tr>
137     <tr>
138     <td><code>ignore_event()</code></td>
139     <td>Drops the given event.</td>
140     </tr>
141     <tr>
142     <td><code>ignore_controller()</code></td>
143     <td>Drops the given MIDI control change event.</td>
144     </tr>
145     <tr>
146     <td><code>note_off()</code></td>
147     <td>Releases the requested note.</td>
148     </tr>
149     <tr>
150     <td><code>set_event_mark()</code></td>
151     <td>Adds an event to an event group.</td>
152     </tr>
153     <tr>
154     <td><code>delete_event_mark()</code></td>
155     <td>Removes an event from some event group.</td>
156     </tr>
157     <tr>
158     <td><code>by_marks()</code></td>
159     <td>Returns all events of an event group.</td>
160     </tr>
161     </table>
162    
163     <h3>GigaStudio Format Functions</h3>
164     <p>
165     Sampler format specific functions, dedicated to the individual features
166     of the GigaStudio format engine.
167     </p>
168     <table>
169     <tr>
170     <th>Function</th> <th>Description</th>
171     </tr>
172     <tr>
173     <td><code>gig_set_dim_zone()</code></td>
174     <td>Changes the currently active dimension zone.</td>
175     </tr>
176     </table>
177    
178     <h2>Built-In Variables</h2>
179     <p>
180     These are the built-in variables and built-in constants available with the
181     NKSP realt-time instrument script language.
182     </p>
183 schoenebeck 2944
184     <h3>Core Language Variables</h3>
185     <p>
186     Most fundamental NKSP built-in variables, independent from any purpose of
187     being used in a sampler.
188     </p>
189     <table>
190     <tr>
191     <th>Variable</th> <th>Description</th>
192     </tr>
193     <tr>
194     <td><code>$KSP_TIMER</code></td>
195     <td>Preserved for compatiblity reasons with KSP, returns the same value
196     as <code>$NKSP_REAL_TIMER</code> (refer to the latter for details).
197     Note that KSP's <code>reset_ksp_timer()</code> function is not available with
198     NKSP. However when calculating time differences between two time
199     stamps taken with <code>$NKSP_REAL_TIMER</code>, calling such a reset
200     function is not required, because the underlying clock does not stop
201     when it reached its value limit (which happens every 71 minutes), instead the clock
202     will automatically restart from zero and the calculated time difference
203     even between such transitions will reflect correct durations.</td>
204     </tr>
205     <tr>
206     <td><code>$NKSP_PERF_TIMER</code></td>
207     <td>Returns the current performance time stamp (in microseconds) of the
208     script running. You may read this variable from time to time to take
209     time stamps which can be used to calculate the time difference
210     (in microseconds) which elapsed between them. A performance time
211     stamp is based on the script's actual CPU execution time. So the
212     internal clock which is used for generating such time stamps is only
213     running forward if the respective script is actually executed by the
214     CPU. Whenever your script is not really executed by the CPU (i.e. because
215     your script got suspended by a wait() call or got forcely suspended due to
216     real-time constraints, or when the entire sampler application got suspended
217     by the OS for other applications or OS tasks) then the underlying internal
218     clock is paused as well.
219     <note class="important">
220     You should only use this built-in variable for script development
221     purposes (i.e. for bench marking the performance of your script).
222     You should <b>not</b> use it with your final production sounds!
223     It is not appropriate for being used in a musical context, because
224     when an offline bounce is performed for instance, the musical timing
225     will be completely unrelated to the CPU execution time. Plus using
226     this variable may cause audio drop outs on some systems. In a musical
227     context you should use <code>$ENGINE_UPTIME</code> instead, which is
228     also safe for offline bounces.
229     </note>
230     <note>
231     On some systems <code>$NKSP_REAL_TIMER</code> and
232     <code>$NKSP_PERF_TIMER</code> will actually return the same value. So the
233     difference between them is not implemented for all systems at the moment.
234     </note>
235     </td>
236     </tr>
237     <tr>
238     <td><code>$NKSP_REAL_TIMER</code></td>
239     <td>Returns the current time stamp in reality (in microseconds). You may
240     read this variable from time to time to take
241     time stamps which can be used to calculate the time difference
242     (in microseconds) which elapsed between them. A "real" time
243     stamp is based on an internal clock which constantly proceeds, so this
244     internal clock also continues counting while your script is either suspended
245     (i.e. because your script got suspended by a wait() call or got forcely
246     suspended due to real-time constraints) and it also continues counting
247     even if the entire sampler application got suspended by the OS (i.e. to
248     execute other applications for multi-tasking or to perform OS tasks).
249     <note class="important">
250     You should only use this built-in variable for script development
251     purposes (i.e. for bench marking the performance of your script).
252     You should <b>not</b> use it with your final production sounds!
253     It is not appropriate for being used in a musical context, because
254     when an offline bounce is performed for instance, the musical timing
255     will be completely unrelated to the CPU execution time. Plus using
256     this variable may cause audio drop outs on some systems. In a musical
257     context you should use <code>$ENGINE_UPTIME</code> instead, which is
258     also safe for offline bounces.
259     </note>
260     <note>
261     On some systems <code>$NKSP_REAL_TIMER</code> and
262     <code>$NKSP_PERF_TIMER</code> will actually return the same value. So the
263     difference between them is not implemented for all systems at the moment.
264     </note>
265     </td>
266     </tr>
267 schoenebeck 2949 <tr>
268     <td><code>$NI_CALLBACK_ID</code></td>
269     <td>Reflects the current event handler instance's unique callback ID.
270     For the same event type there may be more than
271     one event handler instances running. Each one of them has
272     its own callback ID. You can get the current event handler
273     instance's callback ID by reading this built-in variable.</td>
274     </tr>
275     <tr>
276     <td><code>$NI_CALLBACK_TYPE</code></td>
277     <td>Reflects the event type of the current event handler. This variable
278     may reflect one of the following built-in constants:
279     <code>$NI_CB_TYPE_INIT</code>, <code>$NI_CB_TYPE_NOTE</code>,
280     <code>$NI_CB_TYPE_RELEASE</code>, <code>$NI_CB_TYPE_CONTROLLER</code>.</td>
281     </tr>
282     <tr>
283     <td><code>$NI_CB_TYPE_INIT</code></td>
284     <td>Built-in constant reflecting an <code>init</code> event handler type.</td>
285     </tr>
286     <tr>
287     <td><code>$NI_CB_TYPE_NOTE</code></td>
288     <td>Built-in constant reflecting a <code>note</code> event handler type.</td>
289     </tr>
290     <tr>
291     <td><code>$NI_CB_TYPE_RELEASE</code></td>
292     <td>Built-in constant reflecting a <code>release</code> event handler type.</td>
293     </tr>
294     <tr>
295     <td><code>$NI_CB_TYPE_CONTROLLER</code></td>
296     <td>Built-in constant reflecting a <code>controller</code> event handler type.</td>
297     </tr>
298     <tr>
299     <td><code>$NKSP_IGNORE_WAIT</code></td>
300     <td>If this boolean built-in variable is <code>1</code> then all calls of your
301     event handler instance to function <code>wait()</code> will be ignored.
302     This may for example be the case if another event handler instance
303     resumed your paused script by calling <code>stop_wait()</code> and
304     passing <code>1</code> to the 2nd argument of that function.</td>
305     </tr>
306 schoenebeck 2944 </table>
307    
308 schoenebeck 2732 <h3>Common Sampler Variables</h3>
309     <p>
310     Basic sampler related built-in variables and constants, independent from a
311     particular sampler format or sampler engine.
312     </p>
313     <table>
314     <tr>
315     <th>Variable</th> <th>Description</th>
316     </tr>
317     <tr>
318     <td><code>$CC_NUM</code></td>
319     <td>MIDI controller number that caused the <code>controller</code>
320     handler to be executed (only useful in the context of a
321     <code>controller</code> handler).</td>
322     </tr>
323     <tr>
324     <td><code>%CC[]</code></td>
325     <td>Provides access to all current MIDI controller values. This can be
326     used in any context. Use the respective MIDI controller number as
327     index to this integer array variable. For instance <code>%CC[1]</code>
328     would give you the current value of the modulation wheel.
329     </td>
330     </tr>
331     <tr>
332     <td><code>$EVENT_ID</code></td>
333     <td>ID of the event that caused the current event handler to be executed. In
334     the context of a <code>note</code> handler this would be the event
335     ID of the note, within a <code>controller</code> handler it would
336     be the controller event ID, etc.</td>
337     </tr>
338     <tr>
339     <td><code>$EVENT_NOTE</code></td>
340     <td>MIDI note number that caused a note related
341     handler to be executed (only useful in the context of a
342     <code>note</code> or <code>release</code> handler).</td>
343     </tr>
344     <tr>
345     <td><code>$EVENT_VELOCITY</code></td>
346     <td>MIDI velocity value of the note that caused that note related
347     handler to be executed (only useful in the context of a
348     <code>note</code> or <code>release</code> handler).</td>
349     </tr>
350     <tr>
351 schoenebeck 2937 <td><code>$EVENT_STATUS_INACTIVE</code></td>
352     <td>Constant bit flag used as possible return value by
353     <code>event_status()</code> in case the requested
354     note is not "alive".</td>
355     </tr>
356     <tr>
357     <td><code>$EVENT_STATUS_NOTE_QUEUE</code></td>
358     <td>Constant bit flag used as possible return value by
359     <code>event_status()</code> in case the requested
360     note is still "alive".</td>
361     </tr>
362     <tr>
363 schoenebeck 2732 <td><code>%KEY_DOWN[]</code></td>
364     <td>This can be used in any context to check whether a certain MIDI
365     key is currently pressed down. Use the respective MIDI note number
366 schoenebeck 2936 as index to this array variable (see also <code>event_status()</code>).</td>
367 schoenebeck 2732 </tr>
368     <tr>
369     <td><code>$VCC_MONO_AT</code></td>
370     <td>Constant identifying the MIDI monophonic aftertouch controller (also
371     called <i title="Amount of force on held-down key.">
372     MIDI channel pressure
373     </i>). This is somewhat different than in the MIDI standard. With
374     NKSP aftertouch is handled like an additional "regular" MIDI CC controller.
375     Therefore use
376     <code>%CC[$VCC_MONO_AT]</code> to obtain the current aftertouch value
377     in the context of a <code>controller</code> event handler.
378     </td>
379     </tr>
380     <tr>
381     <td><code>$VCC_PITCH_BEND</code></td>
382     <td>Constant identifying the pitch bend wheel controller.
383     This is somewhat different than in the MIDI standard. With
384     NKSP pitch bend is handled like an additional "regular" MIDI CC controller.
385     Therefore use
386 schoenebeck 2936 <code>%CC[$VCC_PITCH_BEND]</code> to obtain the current pitch bend wheel value
387 schoenebeck 2732 in the context of a <code>controller</code> event handler.</td>
388     </tr>
389     <tr>
390     <td><code>$MARK_1</code> to <code>$MARK_28</code></td>
391     <td>Used to select one of the available 28 event groups.
392     See <code>set_event_mark()</code> for details.</td>
393     </tr>
394 schoenebeck 2944 <tr>
395     <td><code>$ENGINE_UPTIME</code></td>
396     <td>Returns the current time stamp (in milliseconds) for being
397     used in a musical context. You may read this variable from time to time
398     to take time stamps which can be used to calculate the time difference
399     (in milliseconds) which elapsed between them. These timing values are
400     based on the internal sample rate and thus it can safely be used to
401     perform musical timing related tasks in your scripts. Especially
402     your script will also continue to behave correctly when an offline bounce
403     of a song is performed.
404     </td>
405     </tr>
406 schoenebeck 2732 </table>
407    
408     <h3>GigaStudio Format Variables</h3>
409     <p>
410     Sampler format specific built-in variables and constants, dedicated to the
411     individual features of the GigaStudio format engine.
412     </p>
413     <table>
414     <tr>
415     <th>Variable</th> <th>Description</th>
416     </tr>
417     <tr>
418     <td><code>$GIG_DIM_CHANNEL</code></td>
419     <td>Constant that identifies the <i>stereo dimension</i>.</td>
420     </tr>
421     <tr>
422     <td><code>$GIG_DIM_LAYER</code></td>
423     <td>Constant that identifies the <i>layer dimension</i>.</td>
424     </tr>
425     <tr>
426     <td><code>$GIG_DIM_VELOCITY</code></td>
427     <td>Constant that identifies the <i>velocity dimension</i>.</td>
428     </tr>
429     <tr>
430     <td><code>$GIG_DIM_AFTERTOUCH</code></td>
431     <td>Constant that identifies the <i>aftertouch dimension</i>.</td>
432     </tr>
433     <tr>
434     <td><code>$GIG_DIM_RELEASE</code></td>
435     <td>Constant that identifies the <i>release trigger dimension</i>.</td>
436     </tr>
437     <tr>
438     <td><code>$GIG_DIM_KEYBOARD</code></td>
439     <td>Constant that identifies the <i>keyboard position dimension</i>.</td>
440     </tr>
441     <tr>
442     <td><code>$GIG_DIM_ROUNDROBIN"</code></td>
443     <td>Constant that identifies the <i>round robin dimension</i>.</td>
444     </tr>
445     <tr>
446     <td><code>$GIG_DIM_RANDOM</code></td>
447     <td>Constant that identifies the <i>random dimension</i>.</td>
448     </tr>
449     <tr>
450     <td><code>$GIG_DIM_SMARTMIDI</code></td>
451     <td>Constant that identifies the <i>start MIDI dimension</i> (a.k.a iMIDI rules).</td>
452     </tr>
453     <tr>
454     <td><code>$GIG_DIM_ROUNDROBINKEY</code></td>
455     <td>Constant that identifies the <i>round robin key dimension</i>.</td>
456     </tr>
457     <tr>
458     <td><code>$GIG_DIM_MODWHEEL</code></td>
459     <td>Constant that identifies the <i>modulation wheel dimension</i>.</td>
460     </tr>
461     <tr>
462     <td><code>$GIG_DIM_SUSTAIN</code></td>
463     <td>Constant that identifies the <i>sustain pedal dimension</i> (a.k.a. hold pedal).</td>
464     </tr>
465     <tr>
466     <td><code>$GIG_DIM_PORTAMENTO</code></td>
467     <td>Constant that identifies the <i>portamento MIDI controller dimension</i>.</td>
468     </tr>
469     <tr>
470     <td><code>$GIG_DIM_SOSTENUTO</code></td>
471     <td>Constant that identifies the <i>sostenuto MIDI controller dimension</i>.</td>
472     </tr>
473     <tr>
474     <td><code>$GIG_DIM_SOFT</code></td>
475     <td>Constant that identifies the <i>soft pedal dimension</i>.</td>
476     </tr>
477     <tr>
478     <td><code>$GIG_DIM_BREATH</code></td>
479     <td>Constant that identifies the <i>breath controller dimension</i>.</td>
480     </tr>
481     <tr>
482     <td><code>$GIG_DIM_FOOT</code></td>
483     <td>Constant that identifies the <i>foot pedal dimension</i>.</td>
484     </tr>
485     <tr>
486     <td><code>$GIG_DIM_PORTAMENTOTIME</code></td>
487     <td>Constant that identifies the <i>portamento time controller dimension</i>.</td>
488     </tr>
489     <tr>
490     <td><code>$GIG_DIM_EFFECT1</code></td>
491     <td>Constant that identifies the <i>effect 1 MIDI controller dimension</i>.</td>
492     </tr>
493     <tr>
494     <td><code>$GIG_DIM_EFFECT2</code></td>
495     <td>Constant that identifies the <i>effect 2 MIDI controller dimension</i>.</td>
496     </tr>
497     <tr>
498     <td><code>$GIG_DIM_EFFECT1DEPTH</code></td>
499     <td>Constant that identifies the <i>effect 1 depth MIDI controller dimension</i>.</td>
500     </tr>
501     <tr>
502     <td><code>$GIG_DIM_EFFECT2DEPTH</code></td>
503     <td>Constant that identifies the <i>effect 2 depth MIDI controller dimension</i>.</td>
504     </tr>
505     <tr>
506     <td><code>$GIG_DIM_EFFECT3DEPTH</code></td>
507     <td>Constant that identifies the <i>effect 3 depth MIDI controller dimension</i>.</td>
508     </tr>
509     <tr>
510     <td><code>$GIG_DIM_EFFECT4DEPTH</code></td>
511     <td>Constant that identifies the <i>effect 4 depth MIDI controller dimension</i>.</td>
512     </tr>
513     <tr>
514     <td><code>$GIG_DIM_EFFECT5DEPTH</code></td>
515     <td>Constant that identifies the <i>effect 5 depth MIDI controller dimension</i>.</td>
516     </tr>
517     <tr>
518     <td><code>$GIG_DIM_GENPURPOSE1</code></td>
519     <td>Constant that identifies the <i>general purpose 1 MIDI controller dimension</i>.</td>
520     </tr>
521     <tr>
522     <td><code>$GIG_DIM_GENPURPOSE2</code></td>
523     <td>Constant that identifies the <i>general purpose 2 MIDI controller dimension</i>.</td>
524     </tr>
525     <tr>
526     <td><code>$GIG_DIM_GENPURPOSE3</code></td>
527     <td>Constant that identifies the <i>general purpose 3 MIDI controller dimension</i>.</td>
528     </tr>
529     <tr>
530     <td><code>$GIG_DIM_GENPURPOSE4</code></td>
531     <td>Constant that identifies the <i>general purpose 4 MIDI controller dimension</i>.</td>
532     </tr>
533     <tr>
534     <td><code>$GIG_DIM_GENPURPOSE5</code></td>
535     <td>Constant that identifies the <i>general purpose 5 MIDI controller dimension</i>.</td>
536     </tr>
537     <tr>
538     <td><code>$GIG_DIM_GENPURPOSE6</code></td>
539     <td>Constant that identifies the <i>general purpose 6 MIDI controller dimension</i>.</td>
540     </tr>
541     <tr>
542     <td><code>$GIG_DIM_GENPURPOSE7</code></td>
543     <td>Constant that identifies the <i>general purpose 7 MIDI controller dimension</i>.</td>
544     </tr>
545     <tr>
546     <td><code>$GIG_DIM_GENPURPOSE8</code></td>
547     <td>Constant that identifies the <i>general purpose 8 MIDI controller dimension</i>.</td>
548     </tr>
549     </table>
550    
551     </body>
552     </html>

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