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1 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
2 <html>
3 <head>
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5 <title>The Linux Sampler Project</title>
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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>
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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 <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
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 an arbitrary user frontend from an arbitrary place over a network connection or
140 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 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 convenient GUI frontend for linuxsampler. qsampler depends on liblscp, so you have to
158 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 </p>
167
168 <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 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 </p>
173 <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
202 <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 if you are compiling linuxsampler, qsampler, libgig or liblscp from CVS, you need to
212 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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