static/netbsd/man4/esa.4 4.html


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<table class="head">
  <tr>
    <td class="head-ltitle">ESA(4)</td>
    <td class="head-vol">Device Drivers Manual</td>
    <td class="head-rtitle">ESA(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">esa</code> &#x2014; <span class="Nd">ESS
    Technology Allegro-1 / Maestro-3 family 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">esa* at pci? dev ? function ?</code>
  <br/>
  <code class="Cd">audio* at audiobus?</code>
  <br/>
  <code class="Cd">options ESA_NUM_VOICES=4</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">esa</code> driver provides support for the
    ESS Allegro-1 and Maestro-3 audio devices on the PCI bus. These devices are
    popular in laptop systems.</p>
<p class="Pp">The Allegro-1 and the Maestro-3 are full-duplex devices that allow
    independent playback and recording at sample rates between 8000Hz and
    48000Hz and are capable of playback at 8 and 16 bit in mono and stereo.</p>
<p class="Pp">Setting options ESA_NUM_VOICES=4 allows for hardware mixing in the
    device driver. Note that due to microcode constraints, the
    <code class="Nm">esa</code> driver is currently limited to 4 simultaneous
    voices.</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">ac97(4)</a>, <a class="Xr">audio(4)</a>,
    <a class="Xr">pci(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">esa</code> device driver appeared in
    <span class="Ux">NetBSD 1.5.3</span>.</p>
</section>
<section class="Sh">
<h1 class="Sh" id="AUTHORS"><a class="permalink" href="#AUTHORS">AUTHORS</a></h1>
<p class="Pp"><span class="An">Jared D. McNeill</span>
    &lt;<a class="Mt" href="mailto:jmcneill@invisible.ca">jmcneill@invisible.ca</a>&gt;</p>
</section>
</div>
<table class="foot">
  <tr>
    <td class="foot-date">May 13, 2008</td>
    <td class="foot-os">NetBSD 10.1</td>
  </tr>
</table>