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Contents

• NAME
• SYNOPSIS
• DESCRIPTION
• INVOKING
• COMMANDS
  • Options
• BUGS
• AUTHOR

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  sound­
       cards 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  cur­
              rent 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 num­
              bered  from  0  (the  default).  Note  that   here,
              "device"  does not mean "mixer channel", but refers
              to the architecture of your soundcard. Many  sound­
              cards  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  docu­
       ment  is by Paul Winkler <zarmzarm@erols.com> and Jaroslav
       Kysela <perex@suse.cz>.


                           27 Jul 1999                          2