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Next: <a href="Audio-Player.html#Audio-Player" accesskey="n" rel="next">Audio Player</a>, Previous: <a href="Audio-File-Utilities.html#Audio-File-Utilities" accesskey="p" rel="prev">Audio File Utilities</a>, Up: <a href="Audio-Processing.html#Audio-Processing" accesskey="u" rel="up">Audio Processing</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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<a name="Audio-Device-Information-1"></a>
<h3 class="section">33.2 Audio Device Information</h3>
<a name="XREFaudiodevinfo"></a><dl>
<dt><a name="index-audiodevinfo"></a>Loadable Function: <em><var>devinfo</var> =</em> <strong>audiodevinfo</strong> <em>()</em></dt>
<dt><a name="index-audiodevinfo-1"></a>Loadable Function: <em><var>devs</var> =</em> <strong>audiodevinfo</strong> <em>(<var>io</var>)</em></dt>
<dt><a name="index-audiodevinfo-2"></a>Loadable Function: <em><var>name</var> =</em> <strong>audiodevinfo</strong> <em>(<var>io</var>, <var>id</var>)</em></dt>
<dt><a name="index-audiodevinfo-3"></a>Loadable Function: <em><var>id</var> =</em> <strong>audiodevinfo</strong> <em>(<var>io</var>, <var>name</var>)</em></dt>
<dt><a name="index-audiodevinfo-4"></a>Loadable Function: <em><var>id</var> =</em> <strong>audiodevinfo</strong> <em>(<var>io</var>, <var>rate</var>, <var>bits</var>, <var>chans</var>)</em></dt>
<dt><a name="index-audiodevinfo-5"></a>Loadable Function: <em><var>supports</var> =</em> <strong>audiodevinfo</strong> <em>(<var>io</var>, <var>id</var>, <var>rate</var>, <var>bits</var>, <var>chans</var>)</em></dt>
<dd>
<p>Return a structure describing the available audio input and output devices.
</p>
<p>The <var>devinfo</var> structure has two fields <code>"input"</code> and
<code>"output"</code>. The value of each field is a structure array with fields
<code>"Name"</code>, "DriverVersion" and <code>"ID"</code> describing
an audio device.
</p>
<p>If the optional argument <var>io</var> is 1, return information about input
devices only. If it is 0, return information about output devices only.
</p>
<p>If the optional argument <var>id</var> is provided, return information about
the corresponding device.
</p>
<p>If the optional argument <var>name</var> is provided, return the id of the
named device.
</p>
<p>Given a sampling rate, bits per sample, and number of channels for an input
or output device, return the ID of the first device that supports playback
or recording using the specified parameters.
</p>
<p>If also given a device ID, return true if the device supports playback or
recording using those parameters.
</p></dd></dl>
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