NAME
mixerctl
—
control audio mixing
SYNOPSIS
mixerctl |
[-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
Themixerctl
command displays or sets various audio
system mixing variables. 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 specified 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 variables. 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 operators
toggle between on
and
off
.
The operators += and -= change the value of a mixer control by the indicated 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
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 eventually.
SEE ALSO
HISTORY
The mixerctl
command first appeared in
NetBSD 1.3.