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revision 1279 by schoenebeck, Fri Aug 10 13:32:44 2007 UTC revision 1675 by schoenebeck, Fri Feb 8 14:21:33 2008 UTC
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128                          <div id="contents">                          <div id="contents">
129    
130                          <h2>FAQ</h2>                          <h2>FAQ</h2>
131                          <p class="default">                          <div class="groupbox">
132                                  Here is a collection of frequently asked questions. Please read them before asking on                                  Here is a collection of frequently asked questions. Please read them before asking on
133                                  the mailing list.<br>                                  the mailing list.<br>
134                                  <ol class="default">                                  <br>
135                                          <li>                                  1.&nbsp;License<br>
136                                                  <a href="#commercial_products">Can I use LinuxSampler in commercial hardware or software products?</a>                                  &nbsp;&nbsp;&nbsp;&nbsp;1.1&nbsp;<a href="#commercial_products">Can I use LinuxSampler in commercial hardware or software products?</a><br>
137                                          </li>                                  &nbsp;&nbsp;&nbsp;&nbsp;1.2&nbsp;<a href="#commercial_music">Can I use LinuxSampler for commercial music production?</a><br>
138                                          <li>                                  &nbsp;&nbsp;&nbsp;&nbsp;1.3&nbsp;<a href="#open_source">LinuxSampler is not open source, you are evil!</a><br>
139                                                  <a href="#commercial_music">Can I use LinuxSampler for commercial music production?</a>                                  &nbsp;&nbsp;&nbsp;&nbsp;1.4&nbsp;<a href="#closed_source">Will LinuxSampler turn closed-source?</a><br>
140                                          </li>                                  &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>
141                                          <li>                                  &nbsp;&nbsp;&nbsp;&nbsp;1.6&nbsp;<a href="#ls_breaking_libgig_license">Doesn't LinuxSampler illegally link against libgig?</a><br>
142                                                  <a href="#open_source">LinuxSampler is not open source, you are evil!</a>                                  &nbsp;&nbsp;&nbsp;&nbsp;1.7&nbsp;<a href="#ls_breaking_license">Doesn't LinuxSampler illegally link against other libraries?</a><br>
143                                          </li>                                  2.&nbsp;General Questions<br>
144                                          <li>                                  &nbsp;&nbsp;&nbsp;&nbsp;2.1&nbsp;<a href="#aga">linuxsampler? qsampler? jsampler? libgig? liblscp? jlscp? ... hu?</a><br>
145                                                  <a href="#aga">linuxsampler? qsampler? jsampler? libgig? liblscp? jlscp? ... hu?</a>                                  &nbsp;&nbsp;&nbsp;&nbsp;2.2&nbsp;<a href="#no_gui">Can I use linuxsampler without a GUI as well?</a><br>
146                                          </li>                                  3.&nbsp;Compilation / Installation<br>
147                                          <li>                                  &nbsp;&nbsp;&nbsp;&nbsp;3.1&nbsp;<a href="#install">What do I need to compile and install?</a><br>
148                                                  <a href="#install">What do I need to compile and install?</a>                                  &nbsp;&nbsp;&nbsp;&nbsp;3.2&nbsp;<a href="#compilarion_error">Compilation of LinuxSampler aborts with ...</a><br>
149                                          </li>                                  &nbsp;&nbsp;&nbsp;&nbsp;3.3&nbsp;<a href="#cvs_checkout">How do I checkout from CVS?</a><br>
150                                          <li>                                  &nbsp;&nbsp;&nbsp;&nbsp;3.4&nbsp;<a href="#compile_cvs">How do I compile from CVS?</a><br>
151                                                  <a href="#compilarion_error">Compilation of LinuxSampler aborts with ...</a>                                  4.&nbsp;Setup<br>
152                                          </li>                                  &nbsp;&nbsp;&nbsp;&nbsp;4.1&nbsp;<a href="#examples_lscp">Are there example LSCP script files somewhere?</a><br>
153                                          <li>                                  &nbsp;&nbsp;&nbsp;&nbsp;4.2&nbsp;<a href="#dropouts">I get dropouts (click sounds, noise), what can I do about it?</a><br>
154                                                  <a href="#cvs_checkout">How do I checkout from CVS?</a>                                  &nbsp;&nbsp;&nbsp;&nbsp;4.3&nbsp;<a href="#runtime_error">LinuxSampler aborts at runtime with ...</a><br>
155                                          </li>                                  <br>
156                                          <li>                          </div>
                                                 <a href="#compile_cvs">How do I compile from CVS?</a>  
                                         </li>  
                                         <li>  
                                                 <a href="#no_gui">Can I use linuxsampler without a GUI as well?</a>  
                                         </li>  
                                         <li>  
                                                 <a href="#examples_lscp">Are there example LSCP script files somewhere?</a>  
                                         </li>  
                                         <li>  
                                                 <a href="#dropouts">I get dropouts (click sounds, noise), what can I do about it?</a>  
                                         </li>  
                 </ol>  
                         </p>  
157    
158                          <a name="commercial_products"></a>                          <a name="commercial_products"></a>
159                          <h3>Can I use LinuxSampler in commercial hardware or software products?</h3>                          <h3>Can I use LinuxSampler in commercial hardware or software products?</h3>
# Line 199  Line 192 
192                          by funding and thus increase development speed.                          by funding and thus increase development speed.
193                          </p>                          </p>
194    
195                            <a name="closed_source"></a>
196                            <h3>Will LinuxSampler turn closed-source?</h3>
197                            <p class="default">
198                            No, LinuxSampler will remain open source. Again, the commercial exception is just to
199                            prevent commercial exploitation by third parties that haven't contributed anything to
200                            open source projects.
201                            </p>
202    
203                            <a name="ls_license_change"></a>
204                            <h3>I've heard the commercial exception of LinuxSampler was added at a certain version?</h3>
205                            <p class="default">
206                            No, the commercial exception in LinuxSampler's license terms were there since day one.
207                            Even further it's not only there since the very first publicly available CVS
208                            (developer) version of LinuxSampler, that commercial exception was even already in
209                            Benno Senoner's proof of concept code called "EVO", which LinuxSampler was based on.
210                            There was even a rumour that we would have manipulated CVS history to "pretend" this
211                            exception wasn't added at a later point. Needless to say that this rumour is completely
212                            false as well. Think about it! We're a group of developers spread around the world who
213                            work on this project for fun and ideology in our spare time. Most of us contributed to
214                            various other open source / free software projects. Do you seriously think we would
215                            cheat on such an issue? Beside that you certainly find various people completely
216                            unrelated to this project who still have early versions of LinuxSampler and / or EVO
217                            and thus can confirm that this commercial exception was always there.
218                            </p>
219    
220                            <a name="ls_breaking_libgig_license"></a>
221                            <h3>Doesn't LinuxSampler illegally link against libgig?</h3>
222                            <p class="default">
223                            No! LinuxSampler does not "illegally" link against libgig, since the copyright holder
224                            (in this case of libgig) has all rights of his work and thus is not bound to his own
225                            license terms. The sole purpose of license terms is to grant other people certain
226                            rights to use the work.
227                            </p>
228    
229                            <a name="ls_breaking_license"></a>
230                            <h3>Doesn't LinuxSampler illegally link against other libraries?</h3>
231                            <p class="default">
232                            No, the only library LinuxSampler links to that has license restrictions regarding
233                            linking is libgig (<a href="#ls_breaking_libgig_license">see above</a>). Especially
234                            LinuxSampler does not break Qt's license terms, since it does not link against Qt at
235                            all.
236                            </p>
237    
238                          <a name="aga"></a>                          <a name="aga"></a>
239                          <h3>linuxsampler? qsampler? jsampler? libgig? liblscp? jlscp? ... hu?</h3>                          <h3>linuxsampler? qsampler? jsampler? gigedit? libgig? liblscp? jlscp? ... hu?</h3>
240                          <p class="default">                          <p class="default">
241                                  There are currently six subprojects in the LinuxSampler project; jlscp, jsampler,                                  There are currently seven subprojects in the LinuxSampler project; jlscp, jsampler,
242                                  libgig, liblscp, linuxsampler and qsampler. linuxsampler is the core of the sampler, it includes the                                  libgig, liblscp, linuxsampler, gigedit and qsampler. linuxsampler is the core of the sampler, it includes the
243                                  sampler engines and audio and MIDI drivers. linuxsampler itself is decoupled from any                                  sampler engines and audio and MIDI drivers. linuxsampler itself is decoupled from any
244                                  user interface. It offers a native C++ API as well as a network server (LSCP server) to allow to be controlled by                                  user interface. It offers a native C++ API as well as a network server (LSCP server) to allow to be controlled by
245                                  an arbitrary user frontend from an arbitrary place over a network connection or                                  an arbitrary user frontend from an arbitrary place over a network connection or
246                                  locally from the same machine as well.                                  (of course) locally from the same machine as well. This decoupled /
247                                  qsampler is the first GUI frontend written for linuxsampler, it is written in C++ using the Qt                                  <a href="http://en.wikipedia.org/wiki/Backend">"backend"</a> design
248                                    of the sampler allows to run it even on a machine without any graphical interface,
249                                    without a Desktop, the machine doesn't even have to have a graphics card!
250                                    qsampler is the first <a href="http://en.wikipedia.org/wiki/Graphical_user_interface">GUI</a>
251                                    <a href="http://en.wikipedia.org/wiki/Frontend">frontend</a>
252                                    written for linuxsampler, it is written in C++ using the Qt
253                                  GUI library and thus can be compiled for various architectures and operating systems                                  GUI library and thus can be compiled for various architectures and operating systems
254                                  without modifications of the source code.                                  without modifications of the source code.
255                                    gigedit is an instruments editor application for Gigasampler format files. You can
256                                    run it as stand-alone application or in conjunction with LinuxSampler. In the latter
257                                    case you can play and immediately hear all your modifications made with gigedit in
258                                    realtime.
259                                  libgig is a C++ library written for accessing Gigasampler files and DLS Level 1 and 2                                  libgig is a C++ library written for accessing Gigasampler files and DLS Level 1 and 2
260                                  files, that is for reading and (since version 3.0.0) also writing of those files.                                  files, that is for reading and (since version 3.0.0) also writing of those files.
261                                  libgig is used by linuxsampler to load Gigasampler files and it <b>can</b> be                                  libgig is used by linuxsampler to load Gigasampler files, it is used by gigedit to
262                                    load, modify and create new Gigasampler files and it <b>can</b> be
263                                  used by qsampler to retrieve additional informations about Gigasampler files. liblscp                                  used by qsampler to retrieve additional informations about Gigasampler files. liblscp
264                                  is a C library written as a wrapper around the LSCP network protocol, thus to control                                  is a C library written as a wrapper around the LSCP network protocol, thus to control
265                                  linuxsampler. It was originally designed to be used on both sides, that is on server /                                  linuxsampler. It was originally designed to be used on both sides, that is on server /
# Line 231  Line 277 
277                                  You should compile and install at least libgig and linuxsampler. As a beginner you should                                  You should compile and install at least libgig and linuxsampler. As a beginner you should
278                                  definitely as well compile and install a convenient GUI frontend like either qsampler or                                  definitely as well compile and install a convenient GUI frontend like either qsampler or
279                                  jsampler, whatever you prefer. qsampler depends on liblscp, so you have to                                  jsampler, whatever you prefer. qsampler depends on liblscp, so you have to
280                                  compile and install liblscp before starting to build qsampler. The recommended order to                                  compile and install liblscp before starting to build qsampler. Also if you like to be
281                                  compile and install is:                                  able to edit instruments, you should compile and install gigedit as well. The recommended
282                                    order to compile and install is:
283                                  <ol class="default">                                  <ol class="default">
284                                    <li>libgig</li>                                    <li>libgig</li>
285                                    <li>linuxsampler</li>                                    <li>linuxsampler</li>
286                                      <li>gigedit</li>
287                                    <li>liblscp</li>                                    <li>liblscp</li>
288                                    <li>qsampler</li>                                    <li>qsampler</li>
289                                  </ol>                                  </ol>
290                          </p>                          </p>
291                            <p class="default">
292                                    Of course you can also install QSampler and JSampler side by side. So you can test and use
293                                    both at the same time.
294                            </p>
295    
296                          <a name="compilarion_error"></a>                          <a name="compilarion_error"></a>
297                          <h3>Compilation of LinuxSampler aborts with ... </h3>                          <h3>Compilation of LinuxSampler aborts with ... </h3>
298    
299                            <p class="default">
300                                    &bull;&nbsp;&nbsp;&nbsp;"<code>Required libgig version not found...</code>"<br>
301                                    <br>
302                                    This error might occur when running LinuxSampler's configure script. Make sure
303                                    you have the required libgig version installed. If you're compiling a CVS
304                                    version of LinuxSampler you usually have to compile and install the current
305                                    CVS version of libgig as well. Also note there are couple common mistakes which
306                                    let this error occur even after having compiled and installed the required
307                                    libgig version. Read
308                                    <a href="https://bugs.linuxsampler.org/cgi-bin/show_bug.cgi?id=29">this bug report</a>
309                                    about common mistakes and how you can fix them.
310                </p>
311    
312                          <p class="default">                          <p class="default">
313                                          &bull;&nbsp;&nbsp;&nbsp;"<code>can't find a register in class `GENERAL_REGS' while reloading `asm'</code>"<br>                                          &bull;&nbsp;&nbsp;&nbsp;"<code>can't find a register in class `GENERAL_REGS' while reloading `asm'</code>"<br>
314                                  <br>                                  <br>
# Line 319  make</pre> Line 385  make</pre>
385                                  real LSCP scripts. You can send a LSCP script to linuxsampler on the console with the                                  real LSCP scripts. You can send a LSCP script to linuxsampler on the console with the
386                                  following command:                                  following command:
387              </p>              </p>
388                          <pre class="code">cat yourscript.lscp | netcat localhost 8888</pre>                          <pre class="code">netcat localhost 8888 &lt; yourscript.lscp</pre>
389                          <p class="default">                          <p class="default">
390                  or on certain systems (like Debian) you have to provide the -t switch:                  or on certain systems (like Debian) you have to provide the -t switch:
391              </p>              </p>
392                          <pre class="code">cat yourscript.lscp | netcat -t localhost 8888</pre>                          <pre class="code">netcat -t localhost 8888 &lt; yourscript.lscp</pre>
393              <p class="default">              <p class="default">
394                                  Of course you can also replace localhost by the IP address of the machine where                                  Of course you can also replace localhost by the IP address of the machine where
395                                  linuxsampler is running. Alternatively you can also make a telnet connection (port 8888)                                  linuxsampler is running. Alternatively you can also make a telnet connection (port 8888)
# Line 355  make</pre> Line 421  make</pre>
421                                  mlockall() memory" on the console, you are safe to run it as ordinary user as well.                                  mlockall() memory" on the console, you are safe to run it as ordinary user as well.
422                          </p>                          </p>
423    
424                            <a name="runtime_error"></a>
425                            <h3>LinuxSampler aborts at runtime with ... </h3>
426                            <p class="default">
427                            Note: For <b>Windows specific runtime errors</b>, please have a
428                            look at the
429                            <a href="windows.html#houston">Trouble Shooting</a> section of
430                            the LinuxSampler Windows HOWTO.
431                            </p>
432    
433                            <p class="default">
434                                    &bull;&nbsp;&nbsp;&nbsp;"<code>gig::Engine error: Failed to
435                                    load instrument, cause: Unknown exception while trying to
436                                    parse gig file.</code>"<br>
437                                    <br>
438                                    Usually LS gives you a meaningful error message in case it
439                                    failed to load an instrument. However there might be rare
440                                    cases where LS cannot resolve the reason and you get an
441                                    error message like above. In this case make sure security /
442                                    user limits aren't set too low. You can list your current
443                                    limits with:
444                            </p>
445                            <pre class="code">ulimit -a</pre>
446                            <p class="default">
447                                    Usually most of those settings are set to "unlimited" on
448                                    most boxes. If this is not the case on yours, make sure that
449                                    at least the limits for "max locked memory", "virtual
450                                    memory" and "data seg size" are sufficiently high enough.
451                                    The exact value depends on the instruments you want to load.
452                                    If your security policy allows it, you could simply set
453                                    those limits to "unlimited" (see also config file
454                                    /etc/security/limits.conf and
455                                    <a href="https://bugs.linuxsampler.org/cgi-bin/show_bug.cgi?id=41">bug report #41</a>).
456                </p>
457    
458                  </div>                  </div>
459                  </td></tr></table>                  </td></tr></table>
460    
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