| MIXERCTL(1) |
AerieBSD 1.0 Refernce Manual |
MIXERCTL(1) |
NAME
mixerctl —
control audio mixing
SYNOPSIS
mixerctl
[-anv]
[-f file]
mixerctl
[-nv]
[-f file]
name...
mixerctl
[-qt]
[-f file]
name...
mixerctl
[-q]
[-f file]
name...
DESCRIPTION
The
mixerctl
command displays or sets various audio system mixing variables.
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.
This is the default, if no parameters are given to
mixerctl.
- -f file
-
Specify an alternative audio mixing device.
- -n
-
Suppress printing of the variable name.
- -q
-
Suppress all printing when setting a variable.
- -t
-
Toggle.
Attempt to select the next possible value
of an enum
(see below).
- -v
-
Show all possible values of variables.
Enum values are shown in
‘’[]
and values belonging to a set are shown in
‘{}’
(see below).
- name
-
Attempt to set the specified variable
name
to
value.
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 control 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.
Variables may take one of three types,
again dependent on the mixer:
-
Enums.
These may take only one out of a possible list of symbolic values
or the literal string
“toggle”,
which toggles the value,
e.g. inputs.mic.source=mic0.
-
Sets.
These can take one or more of a possible list of symbolic values;
multiple values are specified as a comma-separated list,
e.g. record.source=mic,cd.
Additionally,
value
may be omitted to specify the empty set,
e.g. record.source=.
-
Numbers.
Numerical values may be specified in either absolute or relative forms.
The relative form is indicated by a prefix of
"+"
or
"-"
to denote an increase or decrease, respectively.
ENVIRONMENT
- MIXERDEVICE
-
The audio mixer device to use.
FILES
- /dev/mixer
-
default mixer audio device
EXAMPLES
Show possible values for all mixer variables,
and their current settings:
$ mixerctl -av
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
Toggle inputs.dac.mute:
$ mixerctl -t inputs.dac.mute
inputs.dac.mute: off -\*(Gt on
$ mixerctl inputs.dac.mute=toggle
inputs.dac.mute: on -\*(Gt off
SEE ALSO
aucat(1),
audioctl(1),
cdio(1),
audio(4),
mixerctl.conf(5),
sysctl(8)
HISTORY
The
mixerctl
command first appeared in
OpenBSD 2.4.
| AerieBSD 1.0 Reference Manual |
December 26 2008 |
MIXERCTL(1) |