SYNOPSIS

       amixer [-c card] [cmd]


DESCRIPTION

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


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 contents.


       set or sset <SCONTROL> <PARAMETER> ...
              Sets the simple mixer control contents. The parame­
              ter can be the volume either as a  percentage  from
              0% to 100% or an exact hardware value.  The parame­
              ters cap, nocap, mute, unmute, toggle 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 decre­
              mented from the current value, respectively.

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


       get or sget <SCONTROL>
              Shows the simple mixer control contents.

              A  simple mixer control must be specified. Only one
              device can be controlled at a time.
              device,  numid.  The  next  argument  specifies the
              value of control.


       cget <CONTROL>
              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 number.


       [-D device]

              Select the device name to control. The default con­
              trol 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  (record­
              ing).


   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



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