MIXERCTL(1) BSD Reference Manual MIXERCTL(1)NAMEmixerctl - control audio mixing
SYNOPSISmixerctl [-nv] [-f file] -a
mixerctl [-nv] [-f file] name [...]
mixerctl [-q] [-f file] name=value [...]
DESCRIPTION
The mixerctl command displays or sets various audio system mixing vari-
ables. If a list of variables is present on the command line, mixerctl
prints the current value of those variables for the specified device. By
default, mixerctl operates on the /dev/mixer device.
The options are as follows:
-a Print all device variables and their current values.
-f file Specify an alternative audio mixing device.
-n Suppress printing of the variable name.
-q Suppress all printing when setting a variable.
-v Show the possible values of enumeration and set valued vari-
ables. Enumerated values are shown in "[]" and set values are
shown in "{}".
name=value
Attempt to set the specified variable name to value.
Values may be specified in either absolute or relative forms. The rela-
tive form is indicated by a prefix of '+' or '-' to denote an increase or
decrease, respectively.
The exact set of controls that can be manipulated depends on the mixer.
The general format (in both getting and setting a value) is
class.name=value
The class can have values like inputs or outputs indicating that the con-
trol affects the input or output, respectively, to the mixer. The name
indicates what part of the mixer the control affects. Continuous mixer
values, e.g., volume, have numeric values in the range 0-255. If value
can be set for each channel independently, the values are printed
separated by commas. Discrete mixer values, e.g., the recording source,
have symbolic names. Depending on the mixer it may either be an enumera-
tion or a set.
ENVIRONMENT
MIXERDEVICE The audio mixer device to use.
FILES
/dev/mixer default mixer audio device
EXAMPLES
The command
$ mixerctl-a -v
can produce
inputs.mic=0,0 volume
inputs.mic.mute=off [ off on ]
inputs.cd=220,220 volume
inputs.cd.mute=off [ off on ]
inputs.dac=220,220 volume
inputs.dac.mute=off [ off on ]
record.record=220,220 volume
record.record.source=mic [ mic cd dac ]
monitor.monitor=0 volume
SEE ALSOaucat(1), audioctl(1), cdio(1), audio(4), mixerctl.conf(5), sysctl(8)HISTORY
The mixerctl command first appeared in NetBSD 1.3.
MirOS BSD #10-current May 4, 1997 1
