SYNOPSIS
amixer [-c card] [cmd]
DESCRIPTION
amixer allows command-line control of the mixer for the
ALSA soundcard driver. amixer supports multiple sound
cards.
INVOKING
amixer with no arguments will display the current mixer
settings for the default soundcard and device. This is a
good way to see a list of the simple mixer controls you
can use.
COMMANDS
help Shows syntax.
info Shows the information about a mixer device.
scontrols
Shows a complete list of simple mixer controls.
scontents
Shows a complete list of simple mixer controls with
their contents.
set or sset <SCONTROL> <PARAMETER> ...
Sets the simple mixer control contents. The parame
ter can be the volume either as a percentage from
0% to 100% or an exact hardware value. The parame
ters cap, nocap, mute, unmute, toggle are used to
change capture (recording) and muting for the group
specified. The parameters front, rear, center,
woofer are used to specify channels to be changed.
When plus(+) or minus(-) letter is appended after
volume value, the volume is incremented or decre
mented from the current value, respectively.
A simple mixer control must be specified. Only one
device can be controlled at a time.
get or sget <SCONTROL>
Shows the simple mixer control contents.
A simple mixer control must be specified. Only one
device can be controlled at a time.
device, numid. The next argument specifies the
value of control.
cget <CONTROL>
Shows the card control contents. The identifier has
same syntax as for the cset]fP command.
Options
[-c card]
Select the card number to control. The device name
created from this parameter has syntax 'hw:N' where
N is specified card number.
[-D device]
Select the device name to control. The default con
trol name is 'default'.
-h Help: show syntax.
-q Quiet mode. Do not show results of changes.
Example #1:
amixer -c 1 sset Line,0 80%,40% unmute cap
will set the second soundcard's left line input
volume to 80% and right line input to 40%, unmute
it, and select it as a source for capture (record
ing).
Example #2:
amixer -c 2 cset iface=MIXER,name='Line Playback
Volume",index=1 40%
will set the third soundcard's second line playback
volume(s) to 40%
Example #3:
amixer -c 2 cset numid=34 40%
will set the 34th soundcard element to 40%
BUGS
Man(1) output converted with
man2html