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Linux in a Nutshell, 6th Edition by Robert Love, Stephen Figgins, Ellen Siever, Arnold Robbins

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Name

amixer

Synopsis

amixer [options] [command]

Command-line ALSA mixer. For an ncurses interface, use alsamixer. amixer displays or changes the current mixer settings for the current sound card and sound device. To display all mixer settings, use with no flags or commands.

Commands

contents

List card controls and their contents.

controls

Display a complete list of card controls. These controls can be set with the cset command, in contrast to simple mixer controls, which use set or sset.

cget [control]

Display the contents of the specified card control.

cset [control] [parameter]

Set the card control to the value specified in the parameter. Card controls may be identified by iface, name, index, device, subdevice, or numid. The parameter is normally a number or percentage value. For example, the command amixer -c 1 cset numid=16 50% sets the 16th element of the first sound card to 50%.

get, sget [control]

Display the current values for the specified simple mixer control.

help

Display help message and quit.

info

Display information about the current card or the card specified with the -c flag.

scontents

Display a complete list of simple mixer controls and their contents.

scontrols

Display a list of simple mixer controls. Simple mixer controls can be set with the set or sset commands, in contrast to card controls, which use the cset command.

set, sset [control] [parameter]

Set one of the controls listed by scontrols. You can specify the volume with a percentage from 0% to 100%, or a specific hardware value. ...

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