alsa-utils/amixer/amixer.1

.TH AMIXER 1 "11 Aug 2000"
.SH NAME
amixer \- command-line mixer for ALSA soundcard driver
.SH SYNOPSIS
\fBamixer\fP [\fI-c\fP card] [\fIcmd\fP]
.SH DESCRIPTION
\fBamixer\fP allows command-line control of the mixer for the ALSA
soundcard driver.
\fBamixer\fP supports multiple soundcards.
.SH INVOKING

\fBamixer\fR 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.

.SH COMMANDS

.TP
\fIhelp\fP
Shows syntax.

.TP
\fIinfo\fP
Shows the information about a mixer device.

.TP
\fIscontrols\fP
Shows a complete list of simple mixer controls.

.TP
\fIscontents\fP
Shows a complete list of simple mixer controls with their contents.

.TP
\fIset\fP or \fIsset\fP <\fISCONTROL\fP> <\fIPARAMETER\fP> ...
Sets the simple mixer control contents. The parameter can be the volume
either as a percentage from 0% to 100% or an exact hardware value.
The parameters \fIcapture, nocapture, mute, unmute, toggle\fP are used to
change capture (recording) and muting for the group specified.
The parameters \fIfront, rear, center, woofer\fP 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 simple mixer control must be specified. Only one device can be controlled
at a time.

.TP
\fIget\fP or \fIsget\fP <\fISCONTROL\fP>
Shows the simple mixer control contents.

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

.TP
\fIcontrols\fP
Shows a complete list of card controls.

.TP
\fIcontents\fP
Shows a complete list of card controls with their contents.

.TP
\fIcset\fP <\fICONTROL\fP> <\fIPARAMETER\fP> ...
Sets the card control contents. The identifier has these components: iface,
name, index, device, subdevice, numid. The next argument specifies the value
of control.

.TP
\fIcget\fP <\fICONTROL\fP>
Shows the card control contents. The identifier has same syntax as for
the \fIcset]fP command.

.SS Options

.TP
[\fI-c\fP card]

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

.TP
[\fI-D\fP device]

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

.TP
\fI-h\fP 
Help: show syntax.
.TP
\fI-q\fP
Quiet mode. Do not show results of changes.

.SS
Example #1:

.RS
\fBamixer -c 1 sset Line,0 80%,40% unmute capture\fR

.ID
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).\fR

.SS
Example #2:

.RS
\fBamixer -c 2 cset iface=MIXER,name='Line Playback Volume",index=1 40%\fR

.ID
will set the third soundcard's second line playback volume(s) to 40%

.SS
Example #3:

.RS
\fBamixer -c 2 cset numid=34 40%\fR

.ID
will set the 34th soundcard element to 40%

.SH BUGS 
None known.
.SH AUTHOR
\fBamixer\fP is by Jaroslav Kysela <perex@suse.cz>.
This document is by Paul Winkler <zarmzarm@erols.com> and Jaroslav Kysela <perex@suse.cz>.