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\" Author: Lennart Augustsson
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Dd August 15, 2008
Dt MIXERCTL 1
Os
Sh NAME
Nm mixerctl
Nd control audio mixing
Sh SYNOPSIS
Nm
Op Fl d Ar file
Op Fl n
Op Fl v
Fl a
Nm
Op Fl d Ar file
Op Fl n
Op Fl v
Ar name ...
Nm
Op Fl d Ar file
Op Fl n
Fl w
Ar name=value ...
Nm
Op Fl d Ar file
Op Fl n
Fl w
Ar name++ ...
Nm
Op Fl d Ar file
Op Fl n
Fl w
Ar name-- ...
Nm
Op Fl d Ar file
Op Fl n
Fl w
Ar name+=value ...
Nm
Op Fl d Ar file
Op Fl n
Fl w
Ar name-=value ...
Sh DESCRIPTION
The
Nm
command displays or sets various audio system mixing variables.
If a list of variables is present on the command line, then
Nm
prints the current value of those variables for the specified device.
If the
Fl a
flag is specified, all variables for the device are printed.
If the
Fl w
flag is specified,
Nm
attempts to set the specified variables to the given values.
Pp
The
Fl d
flag can be used to give an alternative mixer device.
The default is
Pa /dev/mixer .
Pp
The
Fl n
flag suppresses printing of the variable name.
Pp
The
Fl v
flag shows the possible values of enumeration and set valued
variables.
Enumerated values are shown in brackets
Pq Dq []
and set values are shown in curly braces
Pq Dq {} .
Pp
The exact set of controls that can be manipulated depends on
the mixer.
The general format (in both getting and setting a value) is
br
Va "class.name" = value
br
Va class
can have values like
Li inputs
or
Li outputs ,
indicating that the control affects the input or output
of the mixer, respectively.
Va 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
Va 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 enumeration or a set.
Pp
The suffixes ++ and -- can be used to step through the values of a
mixer control.
For numeric controls, these operators increase or decrease, respectively,
the value by an amount (the delta) suitable to make
the control assume the next possible value.
For binary controls, these operators toggle between
Li on
and
Li off .
Pp
The operators += and -= change the value of a mixer control by the
indicated number of steps.
Sh ENVIRONMENT
Bl -tag -width MIXERDEVICE
It Pa MIXERDEVICE
the mixer device to use.
El
Sh FILES
Bl -tag -width /etc/mixerctl.conf -compact
It Pa /dev/mixer
mixer audio device
It Pa /etc/mixerctl.conf
mixer configuration file
El
Sh EXAMPLES
The command
Dl "mixerctl -a -v"
can produce
Bd -literal
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
Ed
Sh COMPATIBILITY
The old
Fl f
flag is still supported.
This support will be removed eventually.
Sh SEE ALSO
Xr audioctl 1 ,
Xr audio 4 ,
Xr mixerctl.conf 5 ,
Xr sysctl 8
Sh HISTORY
The
Nm
command first appeared in
Nx 1.3 .

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