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<head> |
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<link rel="stylesheet" type="text/css" href="index.css"> |
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<title>The Linux Sampler Project</title> |
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<body> |
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<div id="mainwindow"><img name="LinuxSampler" src="gfx/lsbackground.jpg" alt="LinuxSampler"> |
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<h1><span class="hidden">The LinuxSampler Project</span></h1> |
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<table border=0 cellspacing=0 cellpadding=0><tr><th colspan=2 align=left> |
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<img name="h1blank" src="gfx/h1blank.png" alt="blank"><span class="hidden">about</span></th></tr> |
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<tr><td valign=top> |
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<a id="news" href="index.php" onmouseover="javascript:if(document.images)document.news.src = newsover.src" onmouseout="javascript:if(document.images)document.news.src = newsout.src"><img name="news" src="gfx/mnews.png" alt="news"></a> |
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</td><td valign=top width="100%"> |
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<div id="contents"> |
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<h2>FAQ</h2> |
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<p class="default"> |
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Here is a collection of frequently asked questions. Please read them before asking on |
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schoenebeck |
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the mailing list.<br> |
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<ol class="default"> |
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<li> |
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<a href="#commercial_products">Can I use LinuxSampler in commercial hardware or software products?</a> |
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</li> |
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<li> |
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<a href="#commercial_music">Can I use LinuxSampler for commercial music production?</a> |
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</li> |
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<li> |
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<a href="#open_source">LinuxSampler is not open source, you are evil!</a> |
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</li> |
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<li> |
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<a href="#aga">linuxsampler? qsampler? jsampler? libgig? liblscp? jlscp? ... hu?</a> |
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</li> |
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<li> |
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<a href="#install">What do I need to compile and install?</a> |
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</li> |
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<li> |
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<a href="#compilarion_error">Compilation of LinuxSampler aborts with ...</a> |
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</li> |
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<li> |
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<a href="#cvs_checkout">How do I checkout from CVS?</a> |
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</li> |
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<li> |
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<a href="#compile_cvs">How do I compile from CVS?</a> |
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</li> |
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<li> |
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<a href="#no_gui">Can I use linuxsampler without a GUI as well?</a> |
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</li> |
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<li> |
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<a href="#examples_lscp">Are there example LSCP script files somewhere?</a> |
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</li> |
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<li> |
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<a href="#dropouts">I get dropouts (click sounds, noise), what can I do about it?</a> |
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</li> |
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</ol> |
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senoner |
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</p> |
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<a name="commercial_products"></a> |
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<h3>Can I use LinuxSampler in commercial hardware or software products?</h3> |
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senoner |
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<p class="default"> |
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You are NOT ALLOWED to use LinuxSampler source code, libraries or applications in |
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COMMERCIAL hardware or software products without prior written authorization by the |
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<a href="developers.html">authors</a>. <A HREF="downloads.html">See here</A> |
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</p> |
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senoner |
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<a name="commercial_music"></a> |
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<h3>Can I use LinuxSampler for commercial music production?</h3> |
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<p class="default"> |
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Hell, yes! Every indirect commercial usage of LinuxSampler, which essentially means |
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using its audio output, can of course be used in commercial applications like music |
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productions, live shows, etc. Don't get us wrong, with the mentioned commercial |
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exception we don't want to restrict the normal user / musician, we just want to avoid |
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somebody to directly make money with our work, that is by selling our software in a |
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sampler product like a sampler + sample library bundle, a hardware sampler or |
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something equivalent, at least not without giving something back to the open source |
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Community. |
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</p> |
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<a name="open_source"></a> |
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<h3>LinuxSampler is not open source, you are evil!</h3> |
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<p class="default"> |
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There are of course many definitions of the term "open source", but according to the |
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<a href="http://en.wikipedia.org/wiki/Open_source">definition on Wikipedia</a> |
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LinuxSampler is in fact open source, since you've got complete access to its source |
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code. So due to this fact, a normal user / musician is free to do with LinuxSampler |
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what he likes to do, he can even adjust and tweak every single part of the software |
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by modifying and compiling its source code. And just the fact that we want to avoid |
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our work to be directly exploited in commercial software or hardware products is |
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definitely not an "evil" intention. For the normal user / musician the commercial |
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restriction is even an advantage, since that way commercial actors are forced to |
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support this or another open source project either directly by coding or indirectly |
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by funding and thus increase development speed. |
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</p> |
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<a name="aga"></a> |
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schoenebeck |
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<h3>linuxsampler? qsampler? jsampler? libgig? liblscp? jlscp? ... hu?</h3> |
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senoner |
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<p class="default"> |
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schoenebeck |
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There are currently six subprojects in the LinuxSampler project; jlscp, jsampler, |
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libgig, liblscp, linuxsampler and qsampler. linuxsampler is the core of the sampler, it includes the |
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senoner |
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sampler engines and audio and MIDI drivers. linuxsampler itself is decoupled from any |
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user interface. It offers a native C++ API as well as a network server (LSCP server) to allow to be controlled by |
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an arbitrary user frontend from an arbitrary place over a network connection or |
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locally from the same machine as well. |
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qsampler is the first GUI frontend written for linuxsampler, it is written in C++ using the Qt |
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senoner |
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GUI library and thus can be compiled for various architectures and operating systems |
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without modifications of the source code. |
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libgig is a C++ library written for accessing Gigasampler files and DLS Level 1 and 2 |
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files, that is for reading and (since version 3.0.0) also writing of those files. |
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libgig is used by linuxsampler to load Gigasampler files and it <b>can</b> be |
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used by qsampler to retrieve additional informations about Gigasampler files. liblscp |
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is a C library written as a wrapper around the LSCP network protocol, thus to control |
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linuxsampler. It was originally designed to be used on both sides, that is on server / |
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backend side (linuxsampler) and on client / frontend side (e.g. qsampler). But it's now |
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only used on client side by qsampler at the moment. jsampler is another GUI frontend for |
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linuxsampler, it's written in Java and thus platform independent. jlscp is a library which |
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can be compared with liblscp, with the only difference that jlscp is written in Java and |
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liblscp in C. jsampler requires jlscp. |
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</p> |
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<a name="install"></a> |
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<h3>What do I need to compile and install?</h3> |
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<p class="default"> |
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schoenebeck |
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You should compile and install at least libgig and linuxsampler. As a beginner you should |
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definitely as well compile and install a convenient GUI frontend like either qsampler or |
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jsampler, whatever you prefer. qsampler depends on liblscp, so you have to |
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compile and install liblscp before starting to build qsampler. The recommended order to |
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compile and install is: |
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<ol class="default"> |
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<li>libgig</li> |
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<li>linuxsampler</li> |
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<li>liblscp</li> |
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<li>qsampler</li> |
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</ol> |
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</p> |
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<a name="compilarion_error"></a> |
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<h3>Compilation of LinuxSampler aborts with ... </h3> |
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<p class="default"> |
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• "<code>can't find a register in class `GENERAL_REGS' while reloading `asm'</code>"<br> |
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<br> |
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This is caused by the inline assembly code for |
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<a href="http://en.wikipedia.org/wiki/SIMD">SIMD</a> optimization in older versions of |
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linuxsampler. You have to compile older versions of LinuxSampler (v0.3.3 and older) with |
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-O2 or -O3 to avoid this problem. Usually this is done by default, if not try: |
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<br> |
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</p> |
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<pre class="code">CXXFLAGS="-O3" ./configure |
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make</pre> |
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<p class="default"> |
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Alternatively you could also disable all hand-crafted assembly optimization code by: |
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</p> |
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<pre class="code">./configure --disable-asm |
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make</pre> |
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<p class="default"> |
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but the latter is definitely not recommended, as it will increase CPU usage a lot! |
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</p> |
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|
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<p class="default"> |
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• "<code>../common/Resampler.h:142: error: memory input 2 is not directly addressable</code>"<br> |
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<br> |
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This was reported (<a href="http://sourceforge.net/mailarchive/forum.php?thread_id=9018347&forum_id=12792">1</a>, |
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<a href="http://sourceforge.net/mailarchive/forum.php?thread_id=9019467&forum_id=12792">2</a>) |
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to be a gcc/g++ version problem, in conjunction with the inline assembly code for |
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<a href="http://en.wikipedia.org/wiki/SIMD">SIMD</a> optimization in older versions of |
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linuxsampler. Make sure you got gcc and g++, both of version 3.3 or higher installed. |
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You can check this with: |
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</p> |
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<pre class="code">gcc --version |
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g++ --version</pre> |
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<p class="default"> |
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In case you already got gcc and g++ of version 3.3 or higher |
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installed and it still causes the compilation error mentioned |
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above, try the following: |
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</p> |
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<pre class="code">export CC=`which gcc` |
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export CXX=`which g++`</pre> |
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<p class="default"> |
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On certain systems however you still get this error in conjunction with older |
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versions of LinuxSampler (v0.3.3 and older). Fortunately newer versions of |
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linuxsampler are not affected anymore |
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(<a href="https://bugs.linuxsampler.org/cgi-bin/show_bug.cgi?id=34">read this for details</a>). |
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</p> |
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|
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<a name="cvs_checkout"></a> |
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<h3>How do I checkout from CVS?</h3> |
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<p class="default"> |
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The procedure of checking out the newest version from CVS is described on the |
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<a href="downloads.html#cvs">Downloads</a> site and on the |
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<a href="http://cvs.linuxsampler.org/cgi-bin/viewcvs.cgi/">web interface site |
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of our CVS server</a>. |
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</p> |
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|
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<a name="compile_cvs"></a> |
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senoner |
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<h3>How do I compile from CVS?</h3> |
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<p class="default"> |
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The procedure for compiling from CVS is the same for all subprojects, that is no matter |
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if you are compiling linuxsampler, qsampler, libgig or liblscp from CVS, you need to |
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have the autotools (automake, autoconf and libtool) installed and compile it that way: |
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<pre class="code">make -f Makefile.cvs |
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./configure |
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make</pre> |
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</p> |
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|
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<a name="no_gui"></a> |
| 313 |
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<h3>Can I use linuxsampler without a GUI as well?</h3> |
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|
<p class="default"> |
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Yes, but unfortunately there is no console based frontend for linuxsampler (yet). |
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|
You have to write LSCP scripts and send it to the running linuxsampler application. But |
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don't worry, if you don't know how to write LSCP scripts, you can also start by saving |
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a sampler session with QSampler, because the session files qsampler writes are actually |
| 319 |
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real LSCP scripts. You can send a LSCP script to linuxsampler on the console with the |
| 320 |
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following command: |
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</p> |
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<pre class="code">cat yourscript.lscp | netcat localhost 8888</pre> |
| 323 |
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<p class="default"> |
| 324 |
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|
or on certain systems (like Debian) you have to provide the -t switch: |
| 325 |
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</p> |
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<pre class="code">cat yourscript.lscp | netcat -t localhost 8888</pre> |
| 327 |
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|
<p class="default"> |
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Of course you can also replace localhost by the IP address of the machine where |
| 329 |
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linuxsampler is running. Alternatively you can also make a telnet connection (port 8888) |
| 330 |
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to linuxsampler's LSCP server and type commands manually. |
| 331 |
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</p> |
| 332 |
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|
| 333 |
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<a name="examples_lscp"></a> |
| 334 |
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<h3>Are there example LSCP script files somewhere?</h3> |
| 335 |
|
|
<p class="default"> |
| 336 |
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|
Yes, have a look on the <a href="documentation.html">Documentation</a> site for some |
| 337 |
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|
common LSCP script examples. For details about LSCP read the |
| 338 |
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|
<a href="api/draft-linuxsampler-protocol.html">LSCP reference</a>. Be welcome to ask |
| 339 |
schoenebeck |
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questions for details about LSCP on the |
| 340 |
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|
<a href="http://lists.sourceforge.net/lists/listinfo/linuxsampler-devel">mailing list</a>. |
| 341 |
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</p> |
| 342 |
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|
| 343 |
|
|
<a name="dropouts"></a> |
| 344 |
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|
<h3>I get dropouts (click sounds, noise), what can I do about it?</h3> |
| 345 |
|
|
<p class="default"> |
| 346 |
|
|
In order to achieve good results under Linux you need to have a |
| 347 |
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|
<a href="http://www.linuxdj.com/audio/lad/resourceslatency.php3">patched kernel</a>. |
| 348 |
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|
There are different patches available depending on what version (2.4.x or 2.6.x) of kernel you use. |
| 349 |
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The <a href="http://jackaudio.org/faq">JACK FAQ site</a> |
| 350 |
|
|
(or the <a href="http://jackit.sourceforge.net/docs/faq.php">old JACK FAQ site</a>) |
| 351 |
|
|
is also a good resource for |
| 352 |
senoner |
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how to configure a realtime stable kernel. But note; LinuxSampler currently has not support for |
| 353 |
|
|
libcap yet, that means if you are still using a 2.4.x Linux kernel you most probably have to run |
| 354 |
schoenebeck |
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LinuxSampler with root priviliges. As a rule of thumb: if you don't get warnings like "cannot |
| 355 |
|
|
mlockall() memory" on the console, you are safe to run it as ordinary user as well. |
| 356 |
senoner |
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</p> |
| 357 |
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|
| 358 |
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|
</div> |
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</td></tr></table> |
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</div> |
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</body> |
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</html> |
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