| 122 |
<div id="contents"> |
<div id="contents"> |
| 123 |
|
|
| 124 |
<h2>FAQ</h2> |
<h2>FAQ</h2> |
| 125 |
<p class="default"> |
<div class="groupbox"> |
| 126 |
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 |
| 127 |
the mailing list.<br> |
the mailing list.<br> |
| 128 |
<br> |
<br> |
| 129 |
<a href="#commercial_products">Can I use LinuxSampler in commercial hardware or software products?</a><br> |
1. License<br> |
| 130 |
<a href="#commercial_music">Can I use LinuxSampler for commercial music production?</a><br> |
1.1 <a href="#commercial_products">Can I use LinuxSampler in commercial hardware or software products?</a><br> |
| 131 |
<a href="#open_source">LinuxSampler is not open source, you are evil!</a><br> |
1.2 <a href="#commercial_music">Can I use LinuxSampler for commercial music production?</a><br> |
| 132 |
<a href="#aga">linuxsampler? qsampler? jsampler? libgig? liblscp? jlscp? ... hu?</a><br> |
1.3 <a href="#open_source">LinuxSampler is not open source, you are evil!</a><br> |
| 133 |
<a href="#install">What do I need to compile and install?</a><br> |
1.4 <a href="#closed_source">Will LinuxSampler turn closed-source?</a><br> |
| 134 |
<a href="#compilarion_error">Compilation of LinuxSampler aborts with ...</a><br> |
1.5 <a href="#ls_license_change">I've heard the commercial exception of LinuxSampler was added at a certain version?</a><br> |
| 135 |
<a href="#cvs_checkout">How do I checkout from CVS?</a><br> |
1.6 <a href="#ls_breaking_libgig_license">Doesn't LinuxSampler illegally link against libgig?</a><br> |
| 136 |
<a href="#compile_cvs">How do I compile from CVS?</a><br> |
1.7 <a href="#ls_breaking_license">Doesn't LinuxSampler illegally link against other libraries?</a><br> |
| 137 |
<a href="#no_gui">Can I use linuxsampler without a GUI as well?</a><br> |
2. General Questions<br> |
| 138 |
<a href="#examples_lscp">Are there example LSCP script files somewhere?</a><br> |
2.1 <a href="#aga">linuxsampler? qsampler? jsampler? libgig? liblscp? jlscp? ... hu?</a><br> |
| 139 |
<a href="#dropouts">I get dropouts (click sounds, noise), what can I do about it?</a><br> |
2.2 <a href="#no_gui">Can I use linuxsampler without a GUI as well?</a><br> |
| 140 |
</p> |
3. Compilation / Installation<br> |
| 141 |
|
3.1 <a href="#install">What do I need to compile and install?</a><br> |
| 142 |
|
3.2 <a href="#compilarion_error">Compilation of LinuxSampler aborts with ...</a><br> |
| 143 |
|
3.3 <a href="#cvs_checkout">How do I checkout from CVS?</a><br> |
| 144 |
|
3.4 <a href="#compile_cvs">How do I compile from CVS?</a><br> |
| 145 |
|
4. Setup<br> |
| 146 |
|
4.1 <a href="#examples_lscp">Are there example LSCP script files somewhere?</a><br> |
| 147 |
|
4.2 <a href="#dropouts">I get dropouts (click sounds, noise), what can I do about it?</a><br> |
| 148 |
|
4.3 <a href="#runtime_error">LinuxSampler aborts at runtime with ...</a><br> |
| 149 |
|
<br> |
| 150 |
|
</div> |
| 151 |
|
|
| 152 |
<a name="commercial_products"></a> |
<a name="commercial_products"></a> |
| 153 |
<h3>Can I use LinuxSampler in commercial hardware or software products?</h3> |
<h3>Can I use LinuxSampler in commercial hardware or software products?</h3> |
| 186 |
by funding and thus increase development speed. |
by funding and thus increase development speed. |
| 187 |
</p> |
</p> |
| 188 |
|
|
| 189 |
|
<a name="closed_source"></a> |
| 190 |
|
<h3>Will LinuxSampler turn closed-source?</h3> |
| 191 |
|
<p class="default"> |
| 192 |
|
No, LinuxSampler will remain open source. Again, the commercial exception is just to |
| 193 |
|
prevent commercial exploitation by third parties that haven't contributed anything to |
| 194 |
|
open source projects. |
| 195 |
|
</p> |
| 196 |
|
|
| 197 |
|
<a name="ls_license_change"></a> |
| 198 |
|
<h3>I've heard the commercial exception of LinuxSampler was added at a certain version?</h3> |
| 199 |
|
<p class="default"> |
| 200 |
|
No, the commercial exception in LinuxSampler's license terms were there since day one. |
| 201 |
|
Even further it's not only there since the very first publicly available CVS |
| 202 |
|
(developer) version of LinuxSampler, that commercial exception was even already in |
| 203 |
|
Benno Senoner's proof of concept code called "EVO", which LinuxSampler was based on. |
| 204 |
|
There was even a rumour that we would have manipulated CVS history to "pretend" this |
| 205 |
|
exception wasn't added at a later point. Needless to say that this rumour is completely |
| 206 |
|
false as well. Think about it! We're a group of developers spread around the world who |
| 207 |
|
work on this project for fun and ideology in our spare time. Most of us contributed to |
| 208 |
|
various other open source / free software projects. Do you seriously think we would |
| 209 |
|
cheat on such an issue? Beside that you certainly find various people completely |
| 210 |
|
unrelated to this project who still have early versions of LinuxSampler and / or EVO |
| 211 |
|
and thus can confirm that this commercial exception was always there. |
| 212 |
|
</p> |
| 213 |
|
|
| 214 |
|
<a name="ls_breaking_libgig_license"></a> |
| 215 |
|
<h3>Doesn't LinuxSampler illegally link against libgig?</h3> |
| 216 |
|
<p class="default"> |
| 217 |
|
No! LinuxSampler does not "illegally" link against libgig, since the copyright holder |
| 218 |
|
(in this case of libgig) has all rights of his work and thus is not bound to his own |
| 219 |
|
license terms. The sole purpose of license terms is to grant other people certain |
| 220 |
|
rights to use the work. |
| 221 |
|
</p> |
| 222 |
|
|
| 223 |
|
<a name="ls_breaking_license"></a> |
| 224 |
|
<h3>Doesn't LinuxSampler illegally link against other libraries?</h3> |
| 225 |
|
<p class="default"> |
| 226 |
|
No, the only library LinuxSampler links to that has license restrictions regarding |
| 227 |
|
linking is libgig (<a href="#ls_breaking_libgig_license">see above</a>). Especially |
| 228 |
|
LinuxSampler does not break Qt's license terms, since it does not link against Qt at |
| 229 |
|
all. |
| 230 |
|
</p> |
| 231 |
|
|
| 232 |
<a name="aga"></a> |
<a name="aga"></a> |
| 233 |
<h3>linuxsampler? qsampler? jsampler? libgig? liblscp? jlscp? ... hu?</h3> |
<h3>linuxsampler? qsampler? jsampler? gigedit? libgig? liblscp? jlscp? ... hu?</h3> |
| 234 |
<p class="default"> |
<p class="default"> |
| 235 |
There are currently six subprojects in the LinuxSampler project; jlscp, jsampler, |
There are currently seven subprojects in the LinuxSampler project; jlscp, jsampler, |
| 236 |
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 |
| 237 |
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 |
| 238 |
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 |
| 239 |
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 |
| 240 |
locally from the same machine as well. |
(of course) locally from the same machine as well. This decoupled / |
| 241 |
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 |
| 242 |
|
of the sampler allows to run it even on a machine without any graphical interface, |
| 243 |
|
without a Desktop, the machine doesn't even have to have a graphics card! |
| 244 |
|
qsampler is the first <a href="http://en.wikipedia.org/wiki/Graphical_user_interface">GUI</a> |
| 245 |
|
<a href="http://en.wikipedia.org/wiki/Frontend">frontend</a> |
| 246 |
|
written for linuxsampler, it is written in C++ using the Qt |
| 247 |
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 |
| 248 |
without modifications of the source code. |
without modifications of the source code. |
| 249 |
|
gigedit is an instruments editor application for Gigasampler format files. You can |
| 250 |
|
run it as stand-alone application or in conjunction with LinuxSampler. In the latter |
| 251 |
|
case you can play and immediately hear all your modifications made with gigedit in |
| 252 |
|
realtime. |
| 253 |
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 |
| 254 |
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. |
| 255 |
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 |
| 256 |
|
load, modify and create new Gigasampler files and it <b>can</b> be |
| 257 |
used by qsampler to retrieve additional informations about Gigasampler files. liblscp |
used by qsampler to retrieve additional informations about Gigasampler files. liblscp |
| 258 |
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 |
| 259 |
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 / |
| 271 |
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 |
| 272 |
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 |
| 273 |
jsampler, whatever you prefer. qsampler depends on liblscp, so you have to |
jsampler, whatever you prefer. qsampler depends on liblscp, so you have to |
| 274 |
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 |
| 275 |
compile and install is: |
able to edit instruments, you should compile and install gigedit as well. The recommended |
| 276 |
|
order to compile and install is: |
| 277 |
<ol class="default"> |
<ol class="default"> |
| 278 |
<li>libgig</li> |
<li>libgig</li> |
| 279 |
<li>linuxsampler</li> |
<li>linuxsampler</li> |
| 280 |
|
<li>gigedit</li> |
| 281 |
<li>liblscp</li> |
<li>liblscp</li> |
| 282 |
<li>qsampler</li> |
<li>qsampler</li> |
| 283 |
</ol> |
</ol> |
| 284 |
</p> |
</p> |
| 285 |
|
<p class="default"> |
| 286 |
|
Of course you can also install QSampler and JSampler side by side. So you can test and use |
| 287 |
|
both at the same time. |
| 288 |
|
</p> |
| 289 |
|
|
| 290 |
<a name="compilarion_error"></a> |
<a name="compilarion_error"></a> |
| 291 |
<h3>Compilation of LinuxSampler aborts with ... </h3> |
<h3>Compilation of LinuxSampler aborts with ... </h3> |
| 292 |
|
|
| 293 |
|
<p class="default"> |
| 294 |
|
• "<code>Required libgig version not found...</code>"<br> |
| 295 |
|
<br> |
| 296 |
|
This error might occur when running LinuxSampler's configure script. Make sure |
| 297 |
|
you have the required libgig version installed. If you're compiling a CVS |
| 298 |
|
version of LinuxSampler you usually have to compile and install the current |
| 299 |
|
CVS version of libgig as well. Also note there are couple common mistakes which |
| 300 |
|
let this error occur even after having compiled and installed the required |
| 301 |
|
libgig version. Read |
| 302 |
|
<a href="https://bugs.linuxsampler.org/cgi-bin/show_bug.cgi?id=29">this bug report</a> |
| 303 |
|
about common mistakes and how you can fix them. |
| 304 |
|
</p> |
| 305 |
|
|
| 306 |
<p class="default"> |
<p class="default"> |
| 307 |
• "<code>can't find a register in class `GENERAL_REGS' while reloading `asm'</code>"<br> |
• "<code>can't find a register in class `GENERAL_REGS' while reloading `asm'</code>"<br> |
| 308 |
<br> |
<br> |
| 311 |
linuxsampler. You have to compile older versions of LinuxSampler (v0.3.3 and older) with |
linuxsampler. You have to compile older versions of LinuxSampler (v0.3.3 and older) with |
| 312 |
-O2 or -O3 to avoid this problem. Usually this is done by default, if not try: |
-O2 or -O3 to avoid this problem. Usually this is done by default, if not try: |
| 313 |
<br> |
<br> |
| 314 |
<table class="default" border="0" cellpadding="1" cellspacing="5"> |
</p> |
| 315 |
<tr> |
<pre class="code">CXXFLAGS="-O3" ./configure |
|
<td><pre class="code">1 |
|
|
2</pre> |
|
|
</td> |
|
|
<td width="100%"> |
|
|
<pre class="code">CXXFLAGS="-O3" ./configure |
|
| 316 |
make</pre> |
make</pre> |
| 317 |
</td> |
<p class="default"> |
|
</tr> |
|
|
</table> |
|
|
<br> |
|
| 318 |
Alternatively you could also disable all hand-crafted assembly optimization code by: |
Alternatively you could also disable all hand-crafted assembly optimization code by: |
| 319 |
<table class="default" border="0" cellpadding="1" cellspacing="5"> |
</p> |
| 320 |
<tr> |
<pre class="code">./configure --disable-asm |
|
<td><pre class="code">1 |
|
|
2</pre> |
|
|
</td> |
|
|
<td width="100%"> |
|
|
<pre class="code">./configure --disable-asm |
|
| 321 |
make</pre> |
make</pre> |
| 322 |
</td> |
<p class="default"> |
| 323 |
</tr> |
but the latter is definitely not recommended, as it will increase CPU usage a lot! |
|
</table> |
|
|
<br> |
|
|
but the latter is definitely not recommended, as it will increase CPU usage a lot! |
|
| 324 |
</p> |
</p> |
| 325 |
|
|
| 326 |
<p class="default"> |
<p class="default"> |
| 332 |
<a href="http://en.wikipedia.org/wiki/SIMD">SIMD</a> optimization in older versions of |
<a href="http://en.wikipedia.org/wiki/SIMD">SIMD</a> optimization in older versions of |
| 333 |
linuxsampler. Make sure you got gcc and g++, both of version 3.3 or higher installed. |
linuxsampler. Make sure you got gcc and g++, both of version 3.3 or higher installed. |
| 334 |
You can check this with: |
You can check this with: |
| 335 |
<table class="default" border="0" cellpadding="1" cellspacing="5"> |
</p> |
| 336 |
<tr> |
<pre class="code">gcc --version |
|
<td><pre class="code">1 |
|
|
2</pre> |
|
|
</&d> |
|
|
<td width="100%"> |
|
|
<pre class="code">gcc --version |
|
| 337 |
g++ --version</pre> |
g++ --version</pre> |
| 338 |
</td> |
<p class="default"> |
|
</tr> |
|
|
</table> |
|
| 339 |
In case you already got gcc and g++ of version 3.3 or higher |
In case you already got gcc and g++ of version 3.3 or higher |
| 340 |
installed and it still causes the compilation error mentioned |
installed and it still causes the compilation error mentioned |
| 341 |
above, try the following: |
above, try the following: |
| 342 |
<table class="default" border="0" cellpadding="1" cellspacing="5"> |
</p> |
| 343 |
<tr> |
<pre class="code">export CC=`which gcc` |
|
<td><pre class="code">1 |
|
|
2</pre> |
|
|
</td> |
|
|
<td width="100%"> |
|
|
<pre class="code">export CC=`which gcc` |
|
| 344 |
export CXX=`which g++`</pre> |
export CXX=`which g++`</pre> |
| 345 |
</td> |
<p class="default"> |
|
</tr> |
|
|
</table> |
|
| 346 |
On certain systems however you still get this error in conjunction with older |
On certain systems however you still get this error in conjunction with older |
| 347 |
versions of LinuxSampler (v0.3.3 and older). Fortunately newer versions of |
versions of LinuxSampler (v0.3.3 and older). Fortunately newer versions of |
| 348 |
linuxsampler are not affected anymore |
linuxsampler are not affected anymore |
| 364 |
The procedure for compiling from CVS is the same for all subprojects, that is no matter |
The procedure for compiling from CVS is the same for all subprojects, that is no matter |
| 365 |
if you are compiling linuxsampler, qsampler, libgig or liblscp from CVS, you need to |
if you are compiling linuxsampler, qsampler, libgig or liblscp from CVS, you need to |
| 366 |
have the autotools (automake, autoconf and libtool) installed and compile it that way: |
have the autotools (automake, autoconf and libtool) installed and compile it that way: |
| 367 |
<table class="default" border="0" cellpadding="1" cellspacing="5"> |
<pre class="code">make -f Makefile.cvs |
|
<tr> |
|
|
<td><pre class="code">1 |
|
|
2 |
|
|
3</pre> |
|
|
</td> |
|
|
<td width="100%"> |
|
|
<pre class="code">make -f Makefile.cvs |
|
| 368 |
./configure |
./configure |
| 369 |
make</pre> |
make</pre> |
|
</td> |
|
|
</tr> |
|
|
</table> |
|
| 370 |
</p> |
</p> |
| 371 |
|
|
| 372 |
<a name="no_gui"></a> |
<a name="no_gui"></a> |
| 378 |
a sampler session with QSampler, because the session files qsampler writes are actually |
a sampler session with QSampler, because the session files qsampler writes are actually |
| 379 |
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 |
| 380 |
following command: |
following command: |
| 381 |
<table class="default" border="0" cellpadding="1" cellspacing="5"> |
</p> |
| 382 |
<tr> |
<pre class="code">netcat localhost 8888 < yourscript.lscp</pre> |
| 383 |
<td><pre class="code">1</pre> |
<p class="default"> |
| 384 |
</td> |
or on certain systems (like Debian) you have to provide the -t switch: |
| 385 |
<td width="100%"> |
</p> |
| 386 |
<pre class="code">cat yourscript.lscp | netcat localhost 8888</pre> |
<pre class="code">netcat -t localhost 8888 < yourscript.lscp</pre> |
| 387 |
</td> |
<p class="default"> |
|
</tr> |
|
|
</table> |
|
|
or on certain systems (like Debian) you have to provide the -t switch: |
|
|
<table class="default" border="0" cellpadding="1" cellspacing="5"> |
|
|
<tr> |
|
|
<td><pre class="code">1</pre> |
|
|
</td> |
|
|
<td width="100%"> |
|
|
<pre class="code">cat yourscript.lscp | netcat -t localhost 8888</pre> |
|
|
</td> |
|
|
</tr> |
|
|
</table> |
|
| 388 |
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 |
| 389 |
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) |
| 390 |
to linuxsampler's LSCP server and type commands manually. |
to linuxsampler's LSCP server and type commands manually. |
| 406 |
In order to achieve good results under Linux you need to have a |
In order to achieve good results under Linux you need to have a |
| 407 |
<a href="http://www.linuxdj.com/audio/lad/resourceslatency.php3">patched kernel</a>. |
<a href="http://www.linuxdj.com/audio/lad/resourceslatency.php3">patched kernel</a>. |
| 408 |
There are different patches available depending on what version (2.4.x or 2.6.x) of kernel you use. |
There are different patches available depending on what version (2.4.x or 2.6.x) of kernel you use. |
| 409 |
The <a href="http://jackit.sourceforge.net/docs/faq.php">JACK FAQ site</a> is also a good resource |
The <a href="http://jackaudio.org/faq">JACK FAQ site</a> |
| 410 |
|
(or the <a href="http://jackit.sourceforge.net/docs/faq.php">old JACK FAQ site</a>) |
| 411 |
|
is also a good resource for |
| 412 |
how to configure a realtime stable kernel. But note; LinuxSampler currently has not support for |
how to configure a realtime stable kernel. But note; LinuxSampler currently has not support for |
| 413 |
libcap yet, that means if you are still using a 2.4.x Linux kernel you most probably have to run |
libcap yet, that means if you are still using a 2.4.x Linux kernel you most probably have to run |
| 414 |
LinuxSampler with root priviliges. As a rule of thumb: if you don't get warnings like "cannot |
LinuxSampler with root priviliges. As a rule of thumb: if you don't get warnings like "cannot |
| 415 |
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. |
| 416 |
</p> |
</p> |
| 417 |
|
|
| 418 |
|
<a name="runtime_error"></a> |
| 419 |
|
<h3>LinuxSampler aborts at runtime with ... </h3> |
| 420 |
|
|
| 421 |
|
<p class="default"> |
| 422 |
|
• "<code>gig::Engine error: Failed to |
| 423 |
|
load instrument, cause: Unknown exception while trying to |
| 424 |
|
parse gig file.</code>"<br> |
| 425 |
|
<br> |
| 426 |
|
Usually LS gives you a meaningful error message in case it |
| 427 |
|
failed to load an instrument. However there might be rare |
| 428 |
|
cases where LS cannot resolve the reason and you get an |
| 429 |
|
error message like above. In this case make sure security / |
| 430 |
|
user limits aren't set too low. You can list your current |
| 431 |
|
limits with: |
| 432 |
|
</p> |
| 433 |
|
<pre class="code">ulimit -a</pre> |
| 434 |
|
<p class="default"> |
| 435 |
|
Usually most of those settings are set to "unlimited" on |
| 436 |
|
most boxes. If this is not the case on yours, make sure that |
| 437 |
|
at least the limits for "max locked memory", "virtual |
| 438 |
|
memory" and "data seg size" are sufficiently high enough. |
| 439 |
|
The exact value depends on the instruments you want to load. |
| 440 |
|
If your security policy allows it, you could simply set |
| 441 |
|
those limits to "unlimited" (see also config file |
| 442 |
|
/etc/security/limits.conf and |
| 443 |
|
<a href="https://bugs.linuxsampler.org/cgi-bin/show_bug.cgi?id=41">bug report #41</a>). |
| 444 |
|
</p> |
| 445 |
|
|
| 446 |
</div> |
</div> |
| 447 |
</td></tr></table> |
</td></tr></table> |
| 448 |
|
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