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  &lt;div class=&quot;section&quot; id=&quot;multimedia-services&quot;&gt;
&lt;span id=&quot;mmedia&quot;&gt;&lt;/span&gt;&lt;h1&gt;21. Multimedia Services&lt;a class=&quot;headerlink&quot; href=&quot;#multimedia-services&quot; title=&quot;Permalink to this headline&quot;&gt;¶&lt;/a&gt;&lt;/h1&gt;
&lt;p&gt;The modules described in this chapter implement various algorithms or interfaces
that are mainly useful for multimedia applications.  They are available at the
discretion of the installation.  Here&amp;#8217;s an overview:&lt;/p&gt;
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&lt;li class=&quot;toctree-l1&quot;&gt;&lt;a class=&quot;reference internal&quot; href=&quot;audioop.html&quot;&gt;21.1. &lt;tt class=&quot;docutils literal&quot;&gt;&lt;span class=&quot;pre&quot;&gt;audioop&lt;/span&gt;&lt;/tt&gt; &amp;#8212; Manipulate raw audio data&lt;/a&gt;&lt;/li&gt;
&lt;li class=&quot;toctree-l1&quot;&gt;&lt;a class=&quot;reference internal&quot; href=&quot;imageop.html&quot;&gt;21.2. &lt;tt class=&quot;docutils literal&quot;&gt;&lt;span class=&quot;pre&quot;&gt;imageop&lt;/span&gt;&lt;/tt&gt; &amp;#8212; Manipulate raw image data&lt;/a&gt;&lt;/li&gt;
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&lt;li class=&quot;toctree-l1&quot;&gt;&lt;a class=&quot;reference internal&quot; href=&quot;sunau.html&quot;&gt;21.4. &lt;tt class=&quot;docutils literal&quot;&gt;&lt;span class=&quot;pre&quot;&gt;sunau&lt;/span&gt;&lt;/tt&gt; &amp;#8212; Read and write Sun AU files&lt;/a&gt;&lt;ul&gt;
&lt;li class=&quot;toctree-l2&quot;&gt;&lt;a class=&quot;reference internal&quot; href=&quot;sunau.html#au-read-objects&quot;&gt;21.4.1. AU_read Objects&lt;/a&gt;&lt;/li&gt;
&lt;li class=&quot;toctree-l2&quot;&gt;&lt;a class=&quot;reference internal&quot; href=&quot;sunau.html#au-write-objects&quot;&gt;21.4.2. AU_write Objects&lt;/a&gt;&lt;/li&gt;
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&lt;li class=&quot;toctree-l1&quot;&gt;&lt;a class=&quot;reference internal&quot; href=&quot;wave.html&quot;&gt;21.5. &lt;tt class=&quot;docutils literal&quot;&gt;&lt;span class=&quot;pre&quot;&gt;wave&lt;/span&gt;&lt;/tt&gt; &amp;#8212; Read and write WAV files&lt;/a&gt;&lt;ul&gt;
&lt;li class=&quot;toctree-l2&quot;&gt;&lt;a class=&quot;reference internal&quot; href=&quot;wave.html#wave-read-objects&quot;&gt;21.5.1. Wave_read Objects&lt;/a&gt;&lt;/li&gt;
&lt;li class=&quot;toctree-l2&quot;&gt;&lt;a class=&quot;reference internal&quot; href=&quot;wave.html#wave-write-objects&quot;&gt;21.5.2. Wave_write Objects&lt;/a&gt;&lt;/li&gt;
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&lt;li class=&quot;toctree-l1&quot;&gt;&lt;a class=&quot;reference internal&quot; href=&quot;chunk.html&quot;&gt;21.6. &lt;tt class=&quot;docutils literal&quot;&gt;&lt;span class=&quot;pre&quot;&gt;chunk&lt;/span&gt;&lt;/tt&gt; &amp;#8212; Read IFF chunked data&lt;/a&gt;&lt;/li&gt;
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&lt;li class=&quot;toctree-l1&quot;&gt;&lt;a class=&quot;reference internal&quot; href=&quot;imghdr.html&quot;&gt;21.8. &lt;tt class=&quot;docutils literal&quot;&gt;&lt;span class=&quot;pre&quot;&gt;imghdr&lt;/span&gt;&lt;/tt&gt; &amp;#8212; Determine the type of an image&lt;/a&gt;&lt;/li&gt;
&lt;li class=&quot;toctree-l1&quot;&gt;&lt;a class=&quot;reference internal&quot; href=&quot;sndhdr.html&quot;&gt;21.9. &lt;tt class=&quot;docutils literal&quot;&gt;&lt;span class=&quot;pre&quot;&gt;sndhdr&lt;/span&gt;&lt;/tt&gt; &amp;#8212; Determine type of sound file&lt;/a&gt;&lt;/li&gt;
&lt;li class=&quot;toctree-l1&quot;&gt;&lt;a class=&quot;reference internal&quot; href=&quot;ossaudiodev.html&quot;&gt;21.10. &lt;tt class=&quot;docutils literal&quot;&gt;&lt;span class=&quot;pre&quot;&gt;ossaudiodev&lt;/span&gt;&lt;/tt&gt; &amp;#8212; Access to OSS-compatible audio devices&lt;/a&gt;&lt;ul&gt;
&lt;li class=&quot;toctree-l2&quot;&gt;&lt;a class=&quot;reference internal&quot; href=&quot;ossaudiodev.html#audio-device-objects&quot;&gt;21.10.1. Audio Device Objects&lt;/a&gt;&lt;/li&gt;
&lt;li class=&quot;toctree-l2&quot;&gt;&lt;a class=&quot;reference internal&quot; href=&quot;ossaudiodev.html#mixer-device-objects&quot;&gt;21.10.2. Mixer Device Objects&lt;/a&gt;&lt;/li&gt;
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