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 circumvented by using
/dev/sound0
instead.
SEE ALSO
audioplay(1),
audiorecord(1),
mixerctl(1),
audio(4),
sysctl(8)
HISTORY
The
audioctl
command first appeared in
NetBSD1.3.
COMPATIBILITY
The old
-f
flag is still supported.
This support will be removed eventually.