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-<table class="head">
- <tr>
- <td class="head-ltitle">AUICH(4)</td>
- <td class="head-vol">Device Drivers Manual</td>
- <td class="head-rtitle">AUICH(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">auich</code> &#x2014; <span class="Nd">Intel I/O
- Controller Hub integrated AC'97 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">auich* at pci? dev ? function ?</code>
- <br/>
- <code class="Cd">audio* at audiobus?</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">auich</code> device driver supports the
- integrated AC'97 audio controller of the Intel I/O Controller Hub. Supported
- chipsets include the i82801AA (ICH), i82801AB (ICH0), i82801BA (ICH2),
- i82440MX, i82801CA (ICH3), i82801DB (ICH4), i82801EB (ICH5), i82801FB
- (ICH6), i82801GB/GR (ICH7), and Intel 6300ESB. The driver also supports SiS
- 7012, nForce MCP, nForce2 MCP-T, nForce3 MCP-T, nForce3 250 MCP-T, nForce4,
- and AMD 8111.</p>
-<p class="Pp">The driver provides the following <a class="Xr">sysctl(8)</a>
- read/write variable (when hardware support is available):</p>
-<dl class="Bl-tag">
- <dt id="hw.auich0.ac97rate"><var class="Va">hw.auich0.ac97rate</var></dt>
- <dd>Link rate of the device in Hz. The driver automatically measures and
- calculates the correct rate so you usually don't need to change this.
- There is, however, a chance that the driver miscalculates the rate
- especially on an emulated hardware, resulting in an incorrect playback
- pitch. When this happens you need to manually set this variable to the
- correct value. Try <code class="Li">48000</code> if you don't know the
- correct value as it is the default link rate.</dd>
-</dl>
-</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">ac97(4)</a>, <a class="Xr">audio(4)</a>,
- <a class="Xr">pci(4)</a>, <a class="Xr">sysctl(8)</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">auich</code> device driver appeared in
- <span class="Ux">NetBSD 1.6</span>.</p>
-</section>
-<section class="Sh">
-<h1 class="Sh" id="BUGS"><a class="permalink" href="#BUGS">BUGS</a></h1>
-<p class="Pp">The &#x2018;microphone&#x2019; input DMA channel is not currently
- supported.</p>
-</section>
-</div>
-<table class="foot">
- <tr>
- <td class="foot-date">October 13, 2016</td>
- <td class="foot-os">NetBSD 10.1</td>
- </tr>
-</table>