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
The
mixerctl 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
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 eventually.
SEE ALSO
audioctl(1),
audio(4),
mixerctl.conf(5),
sysctl(8)
HISTORY
The
mixerctl command first appeared in
NetBSD
1.3.