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<H1><A NAME="SECTION0023100000000000000000">
21.1 <tt class="module">sunaudiodev</tt> --
         Access to Sun audio hardware</A>
</H1>

<P>
<A NAME="module-sunaudiodev"></A>
<p class="availability">Availability: <span
 class="platform">SunOS</span>.</p>

<P>
This module allows you to access the Sun audio interface. The Sun
audio hardware is capable of recording and playing back audio data
in u-LAW<a id='l2h-5225' xml:id='l2h-5225'></a> format with a sample rate of 8K per second. A
full description can be found in the <span class="manpage"><i>audio</i>(7I)</span> manual page.

<P>
The module
<tt class="module"><a href="module-sunaudiodev-constants.html">SUNAUDIODEV</a></tt><a id='l2h-5226' xml:id='l2h-5226'></a>
defines constants which may be used with this module.

<P>
This module defines the following variables and functions:

<P>
<dl><dt><b><span class="typelabel">exception</span>&nbsp;<tt id='l2h-5223' xml:id='l2h-5223' class="exception">error</tt></b></dt>
<dd>
This exception is raised on all errors. The argument is a string
describing what went wrong.
</dd></dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-5224' xml:id='l2h-5224' class="function">open</tt></b>(</nobr></td>
  <td><var>mode</var>)</td></tr></table></dt>
<dd>
This function opens the audio device and returns a Sun audio device
object. This object can then be used to do I/O on. The <var>mode</var> parameter
is one of <code>'r'</code> for record-only access, <code>'w'</code> for play-only
access, <code>'rw'</code> for both and <code>'control'</code> for access to the
control device. Since only one process is allowed to have the recorder
or player open at the same time it is a good idea to open the device
only for the activity needed. See <span class="manpage"><i>audio</i>(7I)</span> for details.

<P>
As per the manpage, this module first looks in the environment
variable <code>AUDIODEV</code> for the base audio device filename.  If not
found, it falls back to <span class="file">/dev/audio</span>.  The control device is
calculated by appending ``ctl'' to the base audio device.
</dl>

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<span class="release-info">Release 2.4.2, documentation updated on 28 September 2005.</span>
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