AMIXER(1)							    AMIXER(1)



NAME
       amixer - command-line mixer for ALSA soundcard driver

SYNOPSIS
       amixer [-c card] [cmd]

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

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 simple mixer controls you can use.


COMMANDS
       help   Shows syntax.


       info   Shows the information about a mixer device.


       scontrols
	      Shows a complete list of simple mixer controls.


       scontents
	      Shows a complete list of simple mixer controls with their	 con-
	      tents.


       set or sset   ...
	      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 cap, nocap, mute, unmute, tog-
	      gle are used to change 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,  respec-
	      tively.

	      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.


       controls
	      Shows a complete list of card controls.


       contents
	      Shows a complete list of card controls with their contents.


       cset   ...
	      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.


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


   Options
       [-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-
	      ber.


       [-D device]

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


       -h     Help: show syntax.

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


   Example #1:
       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).


   Example #2:
       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 40%


   Example #3:
       amixer -c 2 cset numid=34 40%
	      will set the 34th soundcard element to 40%


BUGS
       None known.

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



				 11 Aug 2000			    AMIXER(1)

UNIX/Linux commands referenced on this page:

1. display
2. info
3. as
4. at
5. card