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<h2 class="title"><a id="Configuring"></a>Configuring</h2>
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<p>Once you have either unpacked a binary distribution, or built
Csound from sources, you will need to configure Csound so that it will run properly on your system. Installers usually perform these steps for you automatically.
</p>
<p>On all platforms, make sure the directory or directories containing Csound's plugin libraries are in an <code class="literal">OPCODEDIR</code> or <code class="literal">OPCODEDIR64</code> environment variable depending on the precision of the compiled binary.
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<p>The Python opcodes currently require at least Python 2.4, which can be downloaded from <a class="ulink" href="http://www.python.org" target="_top">www.python.org</a> if it is not already on your system. You can check if it is available by typing 'python' on a command prompt or DOS window.
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<h2><a id="idp7129376"></a>Windows</h2>
<p>On Windows, make sure the directory or directories (normally the <code class="filename">C:\Program Files\Csound</code> directory) containing the Csound executables directory are in your <code class="literal">PATH</code> variable, or else copy all the executable files to your Windows <code class="filename">system32</code> directory. Depending on your installation method, you might also need to set the <code class="literal">OPCODEDIR</code> and <code class="literal">OPCODEDIR64</code> environment variables. Assuming that Csound is installed to the default location of <code class="filename">C:\Program Files\Csound</code> you can use (otherwise set the paths accordingly):
</p>
<pre class="screen">set OPCODEDIR=C:\Program Files\Csound\plugins
set OPCODEDIR64=C:\Program Files\Csound\plugins64
set PATH=%PATH%;C:\Program Files\Csound\bin</pre>
<div class="note" title="Missing python24.dll or python25.dll" style="margin-left: 0.5in; margin-right: 0.5in;">
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<th align="left">Missing python24.dll or python25.dll</th>
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<p>If you get a pop-up about the missing Python library (python24.dll or python25.dll) and don't need the python opcodes, just delete <code class="filename">C:\Program Files\Csound\plugins\py.dll</code> and <code class="filename">C:\Program Files\Csound\plugins64\py.dll</code>, and the pop-up about the missing Python library should be gone.</p>
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<h2><a id="idp7168480"></a>Unix and Linux</h2>
<p>On Unix and Linux, either install the Csound program in one of the system <code class="filename">bin</code> directories, typically <code class="filename">/usr/local/bin</code>, and the Csound and plugin shared libraries in places like <code class="filename">/usr/local/lib/csound/plugins</code> or <code class="filename">/usr/local/lib/csound/plugins64</code> and make sure that <code class="literal">OPCODEDIR</code> and <code class="literal">OPCODEDIR64</code> environment variable are set correctly.
</p>
<h2><a id="idp7171312"></a>CsoundAC</h2>
<p>CsoundAC requires some additional configuration. On all
platforms, CsoundAC requires that you have Python installed on your
computer. The directory containing the <code class="filename">_csoundAC</code> shared
library and the <code class="filename">CsoundAC.py</code> file must be in your
<code class="literal">PYTHONPATH</code> environment variable, so that the Python runtime
knows how to load these files.</p>
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