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1 senoner 542 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
2     <html>
3     <head>
4     <link rel="stylesheet" type="text/css" href="index.css">
5     <title>The Linux Sampler Project</title>
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98    
99     <body>
100    
101     <div id="mainwindow"><img name="LinuxSampler" src="gfx/lsbackground.jpg" alt="LinuxSampler">
102    
103     <h1><span class="hidden">The LinuxSampler Project</span></h1>
104    
105     <table border=0 cellspacing=0 cellpadding=0><tr><th colspan=2 align=left>
106     <img name="h1blank" src="gfx/h1blank.png" alt="blank"><span class="hidden">about</span></th></tr>
107     <tr><td valign=top>
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121     </td><td valign=top width="100%">
122     <div id="contents">
123    
124     <h2>FAQ</h2>
125     <p class="default">
126     Here is a collection of frequently asked questions. Please read them before asking on
127     the mailing list.
128     </p>
129 senoner 702 <h3>I want to use LinuxSampler code in commercial hardware or software products </h3>
130     <p class="default">
131     You are NOT ALLOWED to use LinuxSampler code in COMMERCIAL hardware / software products without prior written authorization. <A HREF="downloads.html">See here</A>
132 senoner 542
133     <h3>linuxsampler? qsampler? libgig? liblscp? hu?</h3>
134     <p class="default">
135     There are currently four subprojects in the LinuxSampler project; linuxsampler,
136     qsampler, libgig and liblscp. linuxsampler is the core of the sampler, it includes the
137     sampler engines and audio and MIDI drivers. linuxsampler itself is decoupled from any
138     user interface. It offers a network server (LSCP server) to allow to be controlled by
139 schoenebeck 585 an arbitrary user frontend from an arbitrary place over a network connection or
140 senoner 542 locally from the same machine as well.
141     qsampler is the first GUI frontend written for linuxsampler, it is written with the Qt
142     GUI library and thus can be compiled for various architectures and operating systems
143     without modifications on the source code.
144     libgig is a C++ library written for loading Gigasampler files and DLS Level 1 and 2
145     files. libgig is used by linuxsampler to load Gigasampler files and it <b>can</b> be
146     used by qsampler to retrieve additional informations about Gigasampler files. liblscp
147     is a C library written as a wrapper around the LSCP network protocol, thus to control
148     linuxsampler. It was originally designed to be used on both sides, that is on server /
149     backend side (linuxsampler) and on client / frontend side (e.g. qsampler). But it's now
150     only used on client side by qsampler at the moment.
151     </p>
152    
153     <h3>What do I need to compile and install?</h3>
154     <p class="default">
155 schoenebeck 585 You should compile and install at least libgig and linuxsampler. As a beginner you should
156     definitely as well compile and install liblscp and qsampler. qsampler is a
157 senoner 542 convenient GUI frontend for linuxsampler. qsampler depends on liblscp, so you have to
158 schoenebeck 585 compile and install liblscp before starting to build qsampler. The recommended order to
159     compile and install is:
160     <ol class="default">
161     <li>libgig</li>
162     <li>linuxsampler</li>
163     <li>liblscp</li>
164     <li>qsampler</li>
165     </ol>
166 senoner 542 </p>
167    
168 schoenebeck 616 <h3>Compilation of LinuxSampler aborts with ... </h3>
169     <p class="default">
170     "<code>can't find a register in class `GENERAL_REGS' while reloading `asm'</code>"<br>
171 schoenebeck 618 This is caused by the inline assembly code for SIMD optimization. You currently have to compile LinuxSampler with -O2 or -O3 to avoid this problem. Usually this done by default, if not try:
172 schoenebeck 616 </p>
173 schoenebeck 618 <table class="default" border="0" cellpadding="1" cellspacing="5">
174     <tr>
175     <td><pre class="code">1
176     2</pre>
177     </td>
178     <td width="100%">
179     <pre class="code">CXXFLAGS="-O3" ./configure
180     make</pre>
181     </td>
182     </tr>
183     </table>
184     <p class="default">
185     Alternatively you could also disable all hand-crafted assembly optimization code by:
186     </p>
187     <table class="default" border="0" cellpadding="1" cellspacing="5">
188     <tr>
189     <td><pre class="code">1
190     2</pre>
191     </td>
192     <td width="100%">
193     <pre class="code">./configure --disable-asm
194     make</pre>
195     </td>
196     </tr>
197     </table>
198     <p class="default">
199     but the latter is definitely not recommended!
200     </p>
201 schoenebeck 616
202 senoner 542 <h3>How do I checkout from CVS?</h3>
203     <p class="default">
204     The procedure of checking out the newest version from CVS is described on the
205     <a href="downloads.html">Downloads</a> site.
206     </p>
207    
208     <h3>How do I compile from CVS?</h3>
209     <p class="default">
210     The procedure for compiling from CVS is the same for all subprojects, that is no matter
211 schoenebeck 585 if you are compiling linuxsampler, qsampler, libgig or liblscp from CVS, you need to
212 senoner 542 have the autotools (automake, autoconf and libtool) installed and compile it that way:
213     </p>
214     <table class="default" border="0" cellpadding="1" cellspacing="5">
215     <tr>
216     <td><pre class="code">1
217     2
218     3</pre>
219     </td>
220     <td width="100%">
221     <pre class="code">make -f Makefile.cvs
222     ./configure
223     make</pre>
224     </td>
225     </tr>
226     </table>
227    
228     <h3>Can I use linuxsampler without a GUI as well?</h3>
229     <p class="default">
230     Yes, but unfortunately there is no console based frontend frontend for linuxsampler (yet).
231     You have to write LSCP scripts and send it to the running linuxsampler application.
232     You can send a LSCP script to linuxsampler on the console with the following command:
233     </p>
234     <table class="default" border="0" cellpadding="1" cellspacing="5">
235     <tr>
236     <td><pre class="code">1</pre>
237     </td>
238     <td width="100%">
239     <pre class="code">cat yourscript.lscp | netcat -t localhost 8888</pre>
240     </td>
241     </tr>
242     </table>
243     <p class="default">
244     Of course you can also replace localhost by the IP address of the machine where
245     linuxsampler is running. Alternatively you can also make a telnet connection (port 8888)
246     to linuxsampler's LSCP server and type commands manually.
247     </p>
248    
249    
250     <h3>Are there example LSCP script files somewhere?</h3>
251     <p class="default">
252     Yes, have a look on the <a href="documentation.html">Documentation</a> site for some
253     common LSCP script examples. For details about LSCP read the
254     <a href="api/draft-linuxsampler-protocol.html">LSCP reference</a>. Be welcome to ask
255     questions for details about LSCP on the mailing list.
256     </p>
257    
258     <a name="dropouts"></a>
259     <h3>I get dropouts (click sounds, noise), what can I do about it?</h3>
260     <p class="default">
261     In order to achieve good results under Linux you need to have a
262     <a href="http://www.linuxdj.com/audio/lad/resourceslatency.php3">patched kernel</a>.
263     There are different patches available depending on what version (2.4.x or 2.6.x) of kernel you use.
264     The <a href="http://jackit.sourceforge.net/docs/faq.php">JACK FAQ site</a> is also a good resource
265     how to configure a realtime stable kernel. But note; LinuxSampler currently has not support for
266     libcap yet, that means if you are still using a 2.4.x Linux kernel you most probably have to run
267     LinuxSampler with root priviliges (support for libcap is planned though). As a rule of thumb: if
268     you don't get warnings like "cannot mlockall() memory" you are safe to run it as ordinary user as well.
269     </p>
270    
271     </div>
272     </td></tr></table>
273    
274     </div>
275    
276     </body>
277     </html>

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