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- fixed trivial mistake in FAQ enumeration

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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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 schoenebeck 1468 <div class="groupbox">
126 senoner 542 Here is a collection of frequently asked questions. Please read them before asking on
127 schoenebeck 896 the mailing list.<br>
128 schoenebeck 1468 <br>
129     1.&nbsp;License<br>
130     &nbsp;&nbsp;&nbsp;&nbsp;1.1&nbsp;<a href="#commercial_products">Can I use LinuxSampler in commercial hardware or software products?</a><br>
131     &nbsp;&nbsp;&nbsp;&nbsp;1.2&nbsp;<a href="#commercial_music">Can I use LinuxSampler for commercial music production?</a><br>
132     &nbsp;&nbsp;&nbsp;&nbsp;1.3&nbsp;<a href="#open_source">LinuxSampler is not open source, you are evil!</a><br>
133 schoenebeck 1469 &nbsp;&nbsp;&nbsp;&nbsp;1.4&nbsp;<a href="#closed_source">Will LinuxSampler turn closed-source?</a><br>
134     &nbsp;&nbsp;&nbsp;&nbsp;1.5&nbsp;<a href="#ls_license_change">I've heard the commercial exception of LinuxSampler was added at a certain version?</a><br>
135     &nbsp;&nbsp;&nbsp;&nbsp;1.6&nbsp;<a href="#ls_breaking_libgig_license">Doesn't LinuxSampler illegally link against libgig?</a><br>
136     &nbsp;&nbsp;&nbsp;&nbsp;1.7&nbsp;<a href="#ls_breaking_license">Doesn't LinuxSampler illegally link against other libraries?</a><br>
137 schoenebeck 1468 2.&nbsp;General Questions<br>
138     &nbsp;&nbsp;&nbsp;&nbsp;2.1&nbsp;<a href="#aga">linuxsampler? qsampler? jsampler? libgig? liblscp? jlscp? ... hu?</a><br>
139     &nbsp;&nbsp;&nbsp;&nbsp;2.2&nbsp;<a href="#no_gui">Can I use linuxsampler without a GUI as well?</a><br>
140     3.&nbsp;Compilation / Installation<br>
141     &nbsp;&nbsp;&nbsp;&nbsp;3.1&nbsp;<a href="#install">What do I need to compile and install?</a><br>
142     &nbsp;&nbsp;&nbsp;&nbsp;3.2&nbsp;<a href="#compilarion_error">Compilation of LinuxSampler aborts with ...</a><br>
143     &nbsp;&nbsp;&nbsp;&nbsp;3.3&nbsp;<a href="#cvs_checkout">How do I checkout from CVS?</a><br>
144     &nbsp;&nbsp;&nbsp;&nbsp;3.4&nbsp;<a href="#compile_cvs">How do I compile from CVS?</a><br>
145     4.&nbsp;Setup<br>
146     &nbsp;&nbsp;&nbsp;&nbsp;4.1&nbsp;<a href="#examples_lscp">Are there example LSCP script files somewhere?</a><br>
147     &nbsp;&nbsp;&nbsp;&nbsp;4.2&nbsp;<a href="#dropouts">I get dropouts (click sounds, noise), what can I do about it?</a><br>
148     <br>
149     </div>
150 schoenebeck 896
151     <a name="commercial_products"></a>
152     <h3>Can I use LinuxSampler in commercial hardware or software products?</h3>
153 senoner 702 <p class="default">
154 schoenebeck 703 You are NOT ALLOWED to use LinuxSampler source code, libraries or applications in
155     COMMERCIAL hardware or software products without prior written authorization by the
156     <a href="developers.html">authors</a>. <A HREF="downloads.html">See here</A>
157 schoenebeck 896 </p>
158 senoner 542
159 schoenebeck 896 <a name="commercial_music"></a>
160     <h3>Can I use LinuxSampler for commercial music production?</h3>
161     <p class="default">
162     Hell, yes! Every indirect commercial usage of LinuxSampler, which essentially means
163     using its audio output, can of course be used in commercial applications like music
164     productions, live shows, etc. Don't get us wrong, with the mentioned commercial
165     exception we don't want to restrict the normal user / musician, we just want to avoid
166     somebody to directly make money with our work, that is by selling our software in a
167     sampler product like a sampler + sample library bundle, a hardware sampler or
168     something equivalent, at least not without giving something back to the open source
169     Community.
170     </p>
171    
172     <a name="open_source"></a>
173     <h3>LinuxSampler is not open source, you are evil!</h3>
174     <p class="default">
175     There are of course many definitions of the term "open source", but according to the
176     <a href="http://en.wikipedia.org/wiki/Open_source">definition on Wikipedia</a>
177     LinuxSampler is in fact open source, since you've got complete access to its source
178     code. So due to this fact, a normal user / musician is free to do with LinuxSampler
179     what he likes to do, he can even adjust and tweak every single part of the software
180     by modifying and compiling its source code. And just the fact that we want to avoid
181     our work to be directly exploited in commercial software or hardware products is
182 schoenebeck 897 definitely not an "evil" intention. For the normal user / musician the commercial
183 schoenebeck 896 restriction is even an advantage, since that way commercial actors are forced to
184     support this or another open source project either directly by coding or indirectly
185     by funding and thus increase development speed.
186     </p>
187    
188 schoenebeck 1468 <a name="closed_source"></a>
189     <h3>Will LinuxSampler turn closed-source?</h3>
190     <p class="default">
191     No, LinuxSampler will remain open source. Again, the commercial exception is just to
192     prevent commercial exploitation by third parties that haven't contributed anything to
193     open source projects.
194     </p>
195    
196     <a name="ls_license_change"></a>
197     <h3>I've heard the commercial exception of LinuxSampler was added at a certain version?</h3>
198     <p class="default">
199     No, the commercial exception in LinuxSampler's license terms were there since day one.
200     Even further it's not only there since the very first publicly available CVS
201     (developer) version of LinuxSampler, that commercial exception was even already in
202     Benno Senoner's proof of concept code called "EVO", which LinuxSampler was based on.
203     There was even a rumour that we would have manipulated CVS history to "pretend" this
204     exception wasn't added at a later point. Needless to say that this rumour is completely
205     false as well. Think about it! We're a group of developers spread around the world who
206     work on this project for fun and ideology in our spare time. Most of us contributed to
207     various other open source / free software projects. Do you seriously think we would
208     cheat on such an issue? Beside that you certainly find various people completely
209     unrelated to this project who still have early versions of LinuxSampler and / or EVO
210     and thus can confirm that this commercial exception was always there.
211     </p>
212    
213     <a name="ls_breaking_libgig_license"></a>
214     <h3>Doesn't LinuxSampler illegally link against libgig?</h3>
215     <p class="default">
216     No! LinuxSampler does not "illegally" link against libgig, since the copyright holder
217     (in this case of libgig) has all rights of his work and thus is not bound to his own
218     license terms. The sole purpose of license terms is to grant other people certain
219     rights to use the work.
220     </p>
221    
222     <a name="ls_breaking_license"></a>
223     <h3>Doesn't LinuxSampler illegally link against other libraries?</h3>
224     <p class="default">
225     No, the only library LinuxSampler links to that has license restrictions regarding
226     linking is libgig (<a href="#ls_breaking_libgig_license">see above</a>). Especially
227     LinuxSampler does not break Qt's license terms, since it does not link against Qt at
228     all.
229     </p>
230    
231 schoenebeck 896 <a name="aga"></a>
232 schoenebeck 1404 <h3>linuxsampler? qsampler? jsampler? gigedit? libgig? liblscp? jlscp? ... hu?</h3>
233 senoner 542 <p class="default">
234 schoenebeck 1404 There are currently seven subprojects in the LinuxSampler project; jlscp, jsampler,
235     libgig, liblscp, linuxsampler, gigedit and qsampler. linuxsampler is the core of the sampler, it includes the
236 senoner 542 sampler engines and audio and MIDI drivers. linuxsampler itself is decoupled from any
237 schoenebeck 895 user interface. It offers a native C++ API as well as a network server (LSCP server) to allow to be controlled by
238 schoenebeck 585 an arbitrary user frontend from an arbitrary place over a network connection or
239 schoenebeck 1404 (of course) locally from the same machine as well. This decoupled /
240     <a href="http://en.wikipedia.org/wiki/Backend">"backend"</a> design
241     of the sampler allows to run it even on a machine without any graphical interface,
242     without a Desktop, the machine doesn't even have to have a graphics card!
243     qsampler is the first <a href="http://en.wikipedia.org/wiki/Graphical_user_interface">GUI</a>
244     <a href="http://en.wikipedia.org/wiki/Frontend">frontend</a>
245     written for linuxsampler, it is written in C++ using the Qt
246 senoner 542 GUI library and thus can be compiled for various architectures and operating systems
247 schoenebeck 895 without modifications of the source code.
248 schoenebeck 1404 gigedit is an instruments editor application for Gigasampler format files. You can
249     run it as stand-alone application or in conjunction with LinuxSampler. In the latter
250     case you can play and immediately hear all your modifications made with gigedit in
251     realtime.
252 schoenebeck 895 libgig is a C++ library written for accessing Gigasampler files and DLS Level 1 and 2
253 schoenebeck 897 files, that is for reading and (since version 3.0.0) also writing of those files.
254 schoenebeck 1404 libgig is used by linuxsampler to load Gigasampler files, it is used by gigedit to
255     load, modify and create new Gigasampler files and it <b>can</b> be
256 senoner 542 used by qsampler to retrieve additional informations about Gigasampler files. liblscp
257     is a C library written as a wrapper around the LSCP network protocol, thus to control
258     linuxsampler. It was originally designed to be used on both sides, that is on server /
259     backend side (linuxsampler) and on client / frontend side (e.g. qsampler). But it's now
260 schoenebeck 895 only used on client side by qsampler at the moment. jsampler is another GUI frontend for
261     linuxsampler, it's written in Java and thus platform independent. jlscp is a library which
262     can be compared with liblscp, with the only difference that jlscp is written in Java and
263     liblscp in C. jsampler requires jlscp.
264 schoenebeck 897
265 senoner 542 </p>
266    
267 schoenebeck 896 <a name="install"></a>
268 senoner 542 <h3>What do I need to compile and install?</h3>
269     <p class="default">
270 schoenebeck 585 You should compile and install at least libgig and linuxsampler. As a beginner you should
271 schoenebeck 895 definitely as well compile and install a convenient GUI frontend like either qsampler or
272     jsampler, whatever you prefer. qsampler depends on liblscp, so you have to
273 schoenebeck 1404 compile and install liblscp before starting to build qsampler. Also if you like to be
274     able to edit instruments, you should compile and install gigedit as well. The recommended
275     order to compile and install is:
276 schoenebeck 585 <ol class="default">
277     <li>libgig</li>
278     <li>linuxsampler</li>
279 schoenebeck 1404 <li>gigedit</li>
280 schoenebeck 585 <li>liblscp</li>
281     <li>qsampler</li>
282     </ol>
283 senoner 542 </p>
284 schoenebeck 1404 <p class="default">
285     Of course you can also install QSampler and JSampler side by side. So you can test and use
286     both at the same time.
287     </p>
288 senoner 542
289 schoenebeck 896 <a name="compilarion_error"></a>
290 schoenebeck 616 <h3>Compilation of LinuxSampler aborts with ... </h3>
291 schoenebeck 1404
292 schoenebeck 616 <p class="default">
293 schoenebeck 1404 &bull;&nbsp;&nbsp;&nbsp;"<code>Required libgig version not found...</code>"<br>
294     <br>
295     This error might occur when running LinuxSampler's configure script. Make sure
296     you have the required libgig version installed. If you're compiling a CVS
297     version of LinuxSampler you usually have to compile and install the current
298     CVS version of libgig as well. Also note there are couple common mistakes which
299     let this error occur even after having compiled and installed the required
300     libgig version. Read
301     <a href="https://bugs.linuxsampler.org/cgi-bin/show_bug.cgi?id=29">this bug report</a>
302     about common mistakes and how you can fix them.
303     </p>
304    
305     <p class="default">
306 schoenebeck 895 &bull;&nbsp;&nbsp;&nbsp;"<code>can't find a register in class `GENERAL_REGS' while reloading `asm'</code>"<br>
307     <br>
308     This is caused by the inline assembly code for
309     <a href="http://en.wikipedia.org/wiki/SIMD">SIMD</a> optimization in older versions of
310     linuxsampler. You have to compile older versions of LinuxSampler (v0.3.3 and older) with
311     -O2 or -O3 to avoid this problem. Usually this is done by default, if not try:
312     <br>
313 schoenebeck 1279 </p>
314     <pre class="code">CXXFLAGS="-O3" ./configure
315 schoenebeck 618 make</pre>
316 schoenebeck 1279 <p class="default">
317 schoenebeck 618 Alternatively you could also disable all hand-crafted assembly optimization code by:
318 schoenebeck 1279 </p>
319     <pre class="code">./configure --disable-asm
320 schoenebeck 618 make</pre>
321 schoenebeck 1279 <p class="default">
322     but the latter is definitely not recommended, as it will increase CPU usage a lot!
323 schoenebeck 618 </p>
324 schoenebeck 895
325 schoenebeck 807 <p class="default">
326 schoenebeck 895 &bull;&nbsp;&nbsp;&nbsp;"<code>../common/Resampler.h:142: error: memory input 2 is not directly addressable</code>"<br>
327     <br>
328 schoenebeck 807 This was reported (<a href="http://sourceforge.net/mailarchive/forum.php?thread_id=9018347&forum_id=12792">1</a>,
329     <a href="http://sourceforge.net/mailarchive/forum.php?thread_id=9019467&forum_id=12792">2</a>)
330 schoenebeck 895 to be a gcc/g++ version problem, in conjunction with the inline assembly code for
331     <a href="http://en.wikipedia.org/wiki/SIMD">SIMD</a> optimization in older versions of
332     linuxsampler. Make sure you got gcc and g++, both of version 3.3 or higher installed.
333     You can check this with:
334 schoenebeck 1279 </p>
335     <pre class="code">gcc --version
336 schoenebeck 807 g++ --version</pre>
337 schoenebeck 1279 <p class="default">
338 schoenebeck 807 In case you already got gcc and g++ of version 3.3 or higher
339     installed and it still causes the compilation error mentioned
340     above, try the following:
341 schoenebeck 1279 </p>
342     <pre class="code">export CC=`which gcc`
343 schoenebeck 807 export CXX=`which g++`</pre>
344 schoenebeck 1279 <p class="default">
345 schoenebeck 895 On certain systems however you still get this error in conjunction with older
346     versions of LinuxSampler (v0.3.3 and older). Fortunately newer versions of
347     linuxsampler are not affected anymore
348     (<a href="https://bugs.linuxsampler.org/cgi-bin/show_bug.cgi?id=34">read this for details</a>).
349     </p>
350 schoenebeck 616
351 schoenebeck 896 <a name="cvs_checkout"></a>
352 senoner 542 <h3>How do I checkout from CVS?</h3>
353     <p class="default">
354     The procedure of checking out the newest version from CVS is described on the
355 schoenebeck 895 <a href="downloads.html#cvs">Downloads</a> site and on the
356     <a href="http://cvs.linuxsampler.org/cgi-bin/viewcvs.cgi/">web interface site
357     of our CVS server</a>.
358 senoner 542 </p>
359    
360 schoenebeck 896 <a name="compile_cvs"></a>
361 senoner 542 <h3>How do I compile from CVS?</h3>
362     <p class="default">
363     The procedure for compiling from CVS is the same for all subprojects, that is no matter
364 schoenebeck 585 if you are compiling linuxsampler, qsampler, libgig or liblscp from CVS, you need to
365 senoner 542 have the autotools (automake, autoconf and libtool) installed and compile it that way:
366 schoenebeck 1279 <pre class="code">make -f Makefile.cvs
367 senoner 542 ./configure
368     make</pre>
369 schoenebeck 895 </p>
370 senoner 542
371 schoenebeck 896 <a name="no_gui"></a>
372 senoner 542 <h3>Can I use linuxsampler without a GUI as well?</h3>
373     <p class="default">
374 schoenebeck 895 Yes, but unfortunately there is no console based frontend for linuxsampler (yet).
375     You have to write LSCP scripts and send it to the running linuxsampler application. But
376     don't worry, if you don't know how to write LSCP scripts, you can also start by saving
377     a sampler session with QSampler, because the session files qsampler writes are actually
378     real LSCP scripts. You can send a LSCP script to linuxsampler on the console with the
379     following command:
380 schoenebeck 1279 </p>
381 schoenebeck 1404 <pre class="code">netcat localhost 8888 &lt; yourscript.lscp</pre>
382 schoenebeck 1279 <p class="default">
383     or on certain systems (like Debian) you have to provide the -t switch:
384     </p>
385 schoenebeck 1404 <pre class="code">netcat -t localhost 8888 &lt; yourscript.lscp</pre>
386 schoenebeck 1279 <p class="default">
387 senoner 542 Of course you can also replace localhost by the IP address of the machine where
388     linuxsampler is running. Alternatively you can also make a telnet connection (port 8888)
389     to linuxsampler's LSCP server and type commands manually.
390     </p>
391    
392 schoenebeck 896 <a name="examples_lscp"></a>
393 senoner 542 <h3>Are there example LSCP script files somewhere?</h3>
394     <p class="default">
395     Yes, have a look on the <a href="documentation.html">Documentation</a> site for some
396     common LSCP script examples. For details about LSCP read the
397     <a href="api/draft-linuxsampler-protocol.html">LSCP reference</a>. Be welcome to ask
398 schoenebeck 895 questions for details about LSCP on the
399     <a href="http://lists.sourceforge.net/lists/listinfo/linuxsampler-devel">mailing list</a>.
400 senoner 542 </p>
401    
402     <a name="dropouts"></a>
403     <h3>I get dropouts (click sounds, noise), what can I do about it?</h3>
404     <p class="default">
405     In order to achieve good results under Linux you need to have a
406     <a href="http://www.linuxdj.com/audio/lad/resourceslatency.php3">patched kernel</a>.
407     There are different patches available depending on what version (2.4.x or 2.6.x) of kernel you use.
408 schoenebeck 1045 The <a href="http://jackaudio.org/faq">JACK FAQ site</a>
409     (or the <a href="http://jackit.sourceforge.net/docs/faq.php">old JACK FAQ site</a>)
410     is also a good resource for
411 senoner 542 how to configure a realtime stable kernel. But note; LinuxSampler currently has not support for
412     libcap yet, that means if you are still using a 2.4.x Linux kernel you most probably have to run
413 schoenebeck 895 LinuxSampler with root priviliges. As a rule of thumb: if you don't get warnings like "cannot
414     mlockall() memory" on the console, you are safe to run it as ordinary user as well.
415 senoner 542 </p>
416    
417     </div>
418     </td></tr></table>
419    
420     </div>
421    
422     </body>
423     </html>

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