static/netbsd/man4/man4.evbarm/vcaudio.4 3.html


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<table class="head">
  <tr>
    <td class="head-ltitle">VCAUDIO(4)</td>
    <td class="head-vol">Device Drivers Manual</td>
    <td class="head-rtitle">VCAUDIO(4)</td>
  </tr>
</table>
<div class="manual-text">
<section class="Sh">
<h1 class="Sh" id="NAME"><a class="permalink" href="#NAME">NAME</a></h1>
<p class="Pp"><code class="Nm">vcaudio</code> &#x2014; <span class="Nd">Broadcom
    VideoCore integrated audio device driver</span></p>
</section>
<section class="Sh">
<h1 class="Sh" id="SYNOPSIS"><a class="permalink" href="#SYNOPSIS">SYNOPSIS</a></h1>
<p class="Pp"><code class="Cd">vcaudio* at vchiq?</code></p>
</section>
<section class="Sh">
<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1>
<p class="Pp">The <code class="Nm">vcaudio</code> driver provides support for
    the VideoCore 4 audio interface found on Broadcom SoCs used in boards such
    as the Raspberry Pi.</p>
<p class="Pp">Three outputs are supported: <code class="Li">auto</code>,
    <code class="Li">headphones</code>, and <code class="Li">hdmi</code>. The
    selected output can be changed using the
    <code class="Li">outputs.select</code> <a class="Xr">mixerctl(1)</a>
    variable. <code class="Li">headphones</code> corresponds to the analog 3.5mm
    jack on the Raspberry Pi.</p>
<p class="Pp">The hardware does not support recording.</p>
</section>
<section class="Sh">
<h1 class="Sh" id="SEE_ALSO"><a class="permalink" href="#SEE_ALSO">SEE
  ALSO</a></h1>
<p class="Pp"><a class="Xr">mixerctl(1)</a>, <a class="Xr">audio(4)</a>,
    <a class="Xr">mixer(4)</a>, <a class="Xr">vchiq(4)</a></p>
</section>
<section class="Sh">
<h1 class="Sh" id="HISTORY"><a class="permalink" href="#HISTORY">HISTORY</a></h1>
<p class="Pp">The <code class="Nm">vcaudio</code> device driver appeared in
    <span class="Ux">NetBSD 7.0</span>.</p>
</section>
<section class="Sh">
<h1 class="Sh" id="BUGS"><a class="permalink" href="#BUGS">BUGS</a></h1>
<p class="Pp">The playback block size is fixed at 40ms of audio. The hardware
    output format is fixed at stereo 48kHz 16-bit LPCM so is not configurable
    with <a class="Xr">audiocfg(1)</a>.</p>
</section>
</div>
<table class="foot">
  <tr>
    <td class="foot-date">February 26, 2021</td>
    <td class="foot-os">NetBSD 10.1</td>
  </tr>
</table>