MIXERCTL(1) BSD General Commands Manual MIXERCTL(1)NAMEmixerctl — control audio mixing
SYNOPSISmixerctl [-d file] [-n] [-v] -a
mixerctl [-d file] [-n] [-v] name ...
mixerctl [-d file] [-n] -w name=value ...
mixerctl [-d file] [-n] -w name++ ...
mixerctl [-d file] [-n] -w name-- ...
mixerctl [-d file] [-n] -w name+=value ...
mixerctl [-d file] [-n] -w 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, then
mixerctl 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, mixerctl attempts to set the spec‐
ified variables to the given values.
The -d flag can be used to give an alternative mixer device. The default
is /dev/mixer.
The -n flag suppresses printing of the variable name.
The -v flag shows the possible values of enumeration and set valued vari‐
ables. Enumerated values are shown in brackets (“[]”) and set values are
shown in curly braces (“{}”).
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
class can have values like inputs or outputs, indicating that the control
affects the input or output of the mixer, respectively. 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 enumeration or a set.
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 oper‐
ators toggle between on and off.
The operators += and -= change the value of a mixer control by the indi‐
cated number of steps.
ENVIRONMENT
MIXERDEVICE the mixer device to use.
FILES
/dev/mixer mixer audio device
/etc/mixerctl.conf mixer configuration file
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
COMPATIBILITY
The old -f flag is still supported. This support will be removed eventu‐
ally.
SEE ALSOaudioctl(1), audio(4), mixerctl.conf(5), sysctl(8)HISTORY
The mixerctl command first appeared in NetBSD 1.3.
BSD August 15, 2008 BSD
