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.
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.
Select the card number to control. The device name created from this parameter has syntax 'hw:N' where N is specified card number.
Select the device name to control. The default control name is 'default'.
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.
amixer is by Jaroslav Kysela <email@example.com>. This document is by Paul Winkler <firstname.lastname@example.org> and Jaroslav Kysela <email@example.com>.