audioctl(1) - NetBSD Manual Pages

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AUDIOCTL(1)                 NetBSD Reference Manual                AUDIOCTL(1)


NAME
audioctl - control audio device
SYNOPSIS
audioctl [-f file] [-n] -a audioctl [-f file] [-n] name ... audioctl [-f file] [-n] -w name=value ...
DESCRIPTION
The audioctl command displays or sets various audio system driver vari- ables. If a list of variables is present on the command line, then au- dioctl prints the current value of those variables for the specified de- vice. If the -a flag is specified, all variables for the device are printed. If the -w flag is specified audioctl attempts to set the speci- fied variables to the given values. The -f 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.
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 circumvented by using /dev/sound0 instead.
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)
ENVIRONMENT
AUDIOCTLDEVICE the audio control device to use.
SEE ALSO
audioplay(1), audiorecord(1), mixerctl(1), audio(4), sysctl(8)
HISTORY
The audioctl command first appeared in NetBSD 1.3. NetBSD 1.4 February 18, 1999 1
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