audioctl man page on OpenBSD

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AUDIOCTL(1)		   OpenBSD Reference Manual		   AUDIOCTL(1)

     audioctl - control audio device

     audioctl [-an] [-f file]
     audioctl [-n] [-f file] name ...
     audioctl [-n] [-f file] name=value ...

     The audioctl command displays or sets various audio system driver
     variables.	 If a list of variables is present on the command line,
     audioctl prints the current value of those variables for the specified
     device.  By default, audioctl operates on the /dev/audioctl device.

     The options are as follows:

     -a		   Print all device variables and their current values.	 This
		   is the default, if no parameters are given to audioctl.

     -f file	   Specify an alternative audio control device.

     -n		   Suppress printing of the variable name.

     name=value	   Attempt to set the specified variable name to value.

     AUDIOCTLDEVICE  Audio control device to use.

     /dev/audioctl  default audio control device

     To set the playing sampling rate to 11025 you can enter:

	   $ audioctl play.rate=11025

     Note that many of the variables that can be inspected and changed are
     reset when the /dev/audio device is opened.  This can be circumvented
     like so:

	   $ (cat; audioctl -f /dev/audioctl) > /dev/audio
	   $ (audioctl -f /dev/audioctl play.block_size=1024; cat \
		   > /dev/audio

     aucat(1), cdio(1), mixerctl(1), audio(4), sysctl(8)

     The audioctl command first appeared in NetBSD 1.3.

OpenBSD 4.9		       November 10, 2009		   OpenBSD 4.9

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