amixer Man page

AMIXER(1) General Commands Manual AMIXER(1)


amixer – command-line mixer for ALSA soundcard driver


amixer [-option] [cmd]


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.

help Shows syntax.

info Shows the information about a mixer device.

Shows a complete list of simple mixer controls.

Shows a complete list of simple mixer controls with their con‐

set or sset
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 decre‐
mented 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 play‐
back 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
Shows the simple mixer control contents.

A simple mixer control must be specified. Only one device can be
controlled at a time.

Shows a complete list of card controls.

Shows a complete list of card controls with their contents.

Sets the card control contents. The identifier has these compo‐
nents: iface, name, index, device, subdevice, numid. The next
argument specifies the value of control.

Shows the card control contents. The identifier has same syntax
as for the cset command.


-c card

Select the card number to control. The device name created from
this parameter has syntax ‘hw:N’ where N is specified card num‐

-D device

Select the device name to control. The default control name is

-s | –stdin

Read from stdin and execute the command on each line sequen‐
tially. 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.

-R Use the raw value for evaluating the percentage representation.
This is the default mode.

-M Use the mapped volume for evaluating the percentage representa‐
tion like alsamixer, to be more natural for human ear.

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

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

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

amixer -c 2 cset numid=34 40%
will set the 34th soundcard element to 40%




None known.


amixer is by Jaroslav Kysela . This document is by
Paul Winkler and Jaroslav Kysela .

11 Aug 2000 AMIXER(1)

Ils en parlent aussi

Fix for ALSA Speaker volume level resetting to zero at boot …