AMIXER(1)

NAME
amixer - commandline mixer for ALSA soundcard driver

SYNOPSIS
amixer [-c card] [-d dev] [cmd]

DESCRIPTION
amixer allows command-line control of the mixer for the ALSA soundcard driver. amixer supports multiple soundcards with multiple devices.

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 groups you can control.

COMMANDS

info
    Shows the information about a mixer device.

groups
    Shows a complete list of mixer groups.

gcontents
    Shows a complete list of mixer groups with their contents.

set Sets the group contents. The parameter can be the volume either as a percentage from 0% to 100% or a exact hardware value. The parameters capture, nocapture, mute, unmute are used to toggle 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 decremented from the current value, respectively. A mixer group must be specified. Only one device can be controlled at a time.

get Shows the group contents. A mixer group must be specified. Only one device can be controlled at a time.

elements
    Shows a complete list of mixer elements.

contents
    Shows a complete list of mixer elements with their contents.

eset
    Sets the mixer element contents. This feature is not documented and is intended for experienced users only.

eget
    Shows the mixer element contents. This feature is not documented and is indended for experienced users only.

  Options

[-c card] [-d device]
    Select the card and device number to control. Cards are numbered from 0 (the default). Devices are numbered from 0 (the default). Note that here, "device" does not mean "mixer channel", but refers to the architecture of your soundcard. Many soundcards will only have device 0. Some more complex cards may have more devices. Try using -d 1 and if anything useful happens, now you know more than I do. :)

-h  Help: show syntax.

-q  Quiet mode. Do not show results of changes.

  Example:
    amixer -c 1 set Line 80% unmute capture will set the second soundcard's line input volume to 80%, unmute it, and select it as a source for capture (recording).

BUGS
None known.

AUTHOR
amixer is by Jaroslav Kysela <perex@suse.cz>. This document is by Paul Winkler <zarmzarm@erols.com> and Jaroslav Kysela <perex@suse.cz>.