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AUDIOCTL(1) BSD General Commands Manual AUDIOCTL(1)
NAME
audioctl -- control audio device
SYNOPSIS
audioctl [-d device] [-n] -a
audioctl [-d device] [-n] name ...
audioctl [-d device] [-n] -w 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, then
audioctl prints the current value of those variables for the specified device. If the -a flag is specified, all variables for the device are
printed. If the -w flag is specified audioctl attempts to set the specified variables to the given values.
The -d flag can be used to give an alternative audio control device, the default is /dev/audioctl0.
The -n flag suppresses printing of the variable name.
ENVIRONMENT
AUDIOCTLDEVICE the audio control device to use.
FILES
/dev/audio0 audio I/O device (resets on open)
/dev/audioctl0 audio control device
/dev/sound0 audio I/O device (does not reset on open)
EXAMPLES
To set the playing sampling rate to 11025, you can use
audioctl -w play.sample_rate=11025
To set all of the play parameters for CD-quality audio, you can use
audioctl -w play=44100,2,16,slinear_le
Note that many of the variables that can be inspected and changed with audioctl are reset when /dev/audio0 is opened. This can be circum-
vented by using /dev/sound0 instead.
COMPATIBILITY
The old -f flag is still supported. This support will be removed eventually.
SEE ALSO
audioplay(1), audiorecord(1), mixerctl(1), audio(4), sysctl(8)
HISTORY
The audioctl command first appeared in NetBSD 1.3.
BSD
January 27, 2002 BSD
