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<h3 class="section" id="Audio-Device-Information-1"><span>33.2 Audio Device Information<a class="copiable-link" href="#Audio-Device-Information-1"> ¶</a></span></h3>
<a class="anchor" id="XREFaudiodevinfo"></a><span style="display:block; margin-top:-4.5ex;"> </span>
<dl class="first-deftypefn">
<dt class="deftypefn" id="index-audiodevinfo"><span><code class="def-type"><var class="var">devinfo</var> =</code> <strong class="def-name">audiodevinfo</strong> <code class="def-code-arguments">()</code><a class="copiable-link" href="#index-audiodevinfo"> ¶</a></span></dt>
<dt class="deftypefnx def-cmd-deftypefn" id="index-audiodevinfo-1"><span><code class="def-type"><var class="var">devs</var> =</code> <strong class="def-name">audiodevinfo</strong> <code class="def-code-arguments">(<var class="var">io</var>)</code><a class="copiable-link" href="#index-audiodevinfo-1"> ¶</a></span></dt>
<dt class="deftypefnx def-cmd-deftypefn" id="index-audiodevinfo-2"><span><code class="def-type"><var class="var">name</var> =</code> <strong class="def-name">audiodevinfo</strong> <code class="def-code-arguments">(<var class="var">io</var>, <var class="var">id</var>)</code><a class="copiable-link" href="#index-audiodevinfo-2"> ¶</a></span></dt>
<dt class="deftypefnx def-cmd-deftypefn" id="index-audiodevinfo-3"><span><code class="def-type"><var class="var">id</var> =</code> <strong class="def-name">audiodevinfo</strong> <code class="def-code-arguments">(<var class="var">io</var>, <var class="var">name</var>)</code><a class="copiable-link" href="#index-audiodevinfo-3"> ¶</a></span></dt>
<dt class="deftypefnx def-cmd-deftypefn" id="index-audiodevinfo-4"><span><code class="def-type"><var class="var">driverversion</var> =</code> <strong class="def-name">audiodevinfo</strong> <code class="def-code-arguments">(<var class="var">io</var>, <var class="var">id</var>, "DriverVersion")</code><a class="copiable-link" href="#index-audiodevinfo-4"> ¶</a></span></dt>
<dt class="deftypefnx def-cmd-deftypefn" id="index-audiodevinfo-5"><span><code class="def-type"><var class="var">id</var> =</code> <strong class="def-name">audiodevinfo</strong> <code class="def-code-arguments">(<var class="var">io</var>, <var class="var">rate</var>, <var class="var">bits</var>, <var class="var">chans</var>)</code><a class="copiable-link" href="#index-audiodevinfo-5"> ¶</a></span></dt>
<dt class="deftypefnx def-cmd-deftypefn" id="index-audiodevinfo-6"><span><code class="def-type"><var class="var">supports</var> =</code> <strong class="def-name">audiodevinfo</strong> <code class="def-code-arguments">(<var class="var">io</var>, <var class="var">id</var>, <var class="var">rate</var>, <var class="var">bits</var>, <var class="var">chans</var>)</code><a class="copiable-link" href="#index-audiodevinfo-6"> ¶</a></span></dt>
<dd>
<p>Return a structure describing the available audio input and output devices.
</p>
<p>The <var class="var">devinfo</var> structure has two fields <code class="code">"input"</code> and
<code class="code">"output"</code>. The value of each field is a structure array with fields
<code class="code">"Name"</code>, <code class="code">"DriverVersion"</code> and <code class="code">"ID"</code> describing
an audio device.
</p>
<p>If the optional argument <var class="var">io</var> is 1, return information about input devices
only. If it is 0, return information about output devices only. If <var class="var">io</var>
is the only argument supplied, return the number of input or output devices
available.
</p>
<p>If the optional argument <var class="var">id</var> is provided, return information about the
corresponding device.
</p>
<p>If the optional argument <var class="var">name</var> is provided, return the ID of the named
device.
</p>
<p>If the optional argument <code class="code">"DriverVersion"</code> is given, return the
name of the driver for the specified 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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