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<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968" /><title>Multiple Codecs</title><meta name="generator" content="DocBook XSL Stylesheets V1.76.1" /><link rel="home" href="index.html" title="Writing an ALSA Driver" /><link rel="up" href="api-ac97.html" title="Chapter 7. API for AC97 Codec" /><link rel="prev" href="api-ac97-proc-files.html" title="Proc Files" /><link rel="next" href="midi-interface.html" title="Chapter 8. MIDI (MPU401-UART) Interface" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Multiple Codecs</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="api-ac97-proc-files.html">Prev</a> </td><th width="60%" align="center">Chapter 7. API for AC97 Codec</th><td width="20%" align="right"> <a accesskey="n" href="midi-interface.html">Next</a></td></tr></table><hr /></div><div class="section" title="Multiple Codecs"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="api-ac97-multiple-codecs"></a>Multiple Codecs</h2></div></div></div><p>
When there are several codecs on the same card, you need to
call <code class="function">snd_ac97_mixer()</code> multiple times with
ac97.num=1 or greater. The <em class="structfield"><code>num</code></em> field
specifies the codec number.
</p><p>
If you set up multiple codecs, you either need to write
different callbacks for each codec or check
ac97->num in the callback routines.
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