amixer
command-line mixer for ALSA soundcard driver
Synopsis
amixer
[-option] [cmd]
add an example, a script, a trick and tips
examples
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 (recording).
amixer -c 1 -- sset Master playback -20dB
will set the master volume of the second card to -20dB. If the
master has multiple channels, all channels are set to the same
value.
amixer -c 1 set PCM 2dB+
will increase the PCM volume of the second card with 2dB. When
both playback and capture volumes exist, this is applied to both
volumes.
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%
amixer -c 2 cset numid=34 40%
will set the 34th soundcard element to 40%
source
amixer -q sset Master toggle
source
amixer get Master | grep "off"
&& amixer set Master unmute ||
amixer set Master mute
source
amixer -q sset Master unmute
amixer -q sset Speaker unmute
amixer -q sset Headphone unmute
amixer -q sset Speaker mute
amixer -q sset Speaker mute
amixer -q sset Speaker unmute
#amixer -q sset Master unmute
#amixer -q sset Speaker unmute
source
amixer -q sset Master 5- unmute
source
amixer -q sset Master 5+ unmute
description
amixer
allows command-line control of the mixer for the ALSA
soundcard driver. amixer supports multiple
soundcards.
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.
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 control name is
’default’.
-s |
--stdin
Read from stdin
and execute the command on each line sequentially. When this
option is given, the command in command-line arguments is
ignored.
Only sset and
cset are accepted. Other commands are ignored. The commands
to unmatched ids are ignored without errors too.
-h
Help: show syntax.
-q
Quiet mode. Do not show results of changes.
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 parameter can be the
volume either as a percentage from 0% to 100% with %
suffix, a dB gain with dB suffix (like -12.5dB), or an
exact hardware value. The dB gain can be used only for the mixer
elements with available dB information. When plus(+) or minus(-)
letter is appended after volume value, the volume is incremented
or decremented from the current value, respectively.
The parameters cap, nocap, mute, unmute, toggle are used
to change capture (recording) and muting for the group specified.
The optional modifiers can be put as extra parameters to specify
the stream direction or channels to apply. The modifiers
playback and capture specify the stream, and the
modifiers front, rear, center, woofer are used to specify
channels to be changed.
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.
controls
Shows a complete list of card controls.
contents
Shows a complete list of card controls with their contents.
cset <CONTROL> <PARAMETER> ...
Sets the card control contents. The identifier has these
components: iface, name, index, device, subdevice, 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 command.
bugs
None known.
author
amixer
is by Jaroslav Kysela <perex[:at:]perex[:dot:]cz>. This document
is by Paul Winkler <zarmzarm[:at:]erols[:dot:]com> and Jaroslav
Kysela <perex[:at:]perex[:dot:]cz>.