AUDIOCTL(1) OpenBSD Reference Manual AUDIOCTL(1)NAMEaudioctl - control audio device
SYNOPSISaudioctl [-an] [-f file]
audioctl [-n] [-f file] name ...
audioctl [-n] [-f file] name=value ...
DESCRIPTION
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.
ENVIRONMENT
AUDIOCTLDEVICE Audio control device to use.
FILES
/dev/audioctl default audio control device
EXAMPLES
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 file.au; audioctl-f /dev/audioctl) > /dev/audio
or
$ (audioctl -f /dev/audioctl play.block_size=1024; cat file.au) \
> /dev/audio
SEE ALSOaucat(1), cdio(1), mixerctl(1), audio(4), sysctl(8)HISTORY
The audioctl command first appeared in NetBSD 1.3.
OpenBSD 4.9 November 10, 2009 OpenBSD 4.9