AMIXER(1)                            General Commands Manual                            AMIXER(1)

NAME
       amixer - command-line mixer for ALSA soundcard driver

SYNOPSIS
       amixer [-option] [cmd]

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

       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 parameter can be the volume either as a
              percentage from 0% to 100% with % suffix, a dB gain with dB suffix (like  -12.5dB),
              or  an  exact  hardware value.  The dB gain can be used only for the mixer elements
              with available dB information.  When plus(+) or minus(-) letter is  appended  after
              volume  value, the volume is incremented or decremented from the current value, re‐
              spectively.

              The parameters cap, nocap, mute, unmute, toggle are used to change capture (record‐
              ing) and muting for the group specified.

              The  optional modifiers can be put as extra parameters to specify the stream direc‐
              tion or channels to apply.  The modifiers playback and capture specify the  stream,
              and  the  modifiers  front, rear, center, woofer are used to specify channels to be
              changed.

              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.

       controls
              Shows a complete list of card controls.

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

       cset <CONTROL> <PARAMETER> ...
              Sets the card control contents. The identifier has these components:  iface,  name,
              index, device, subdevice, 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
              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 control name is 'default'.

       -s | --stdin

              Read  from  stdin and execute the command on each line sequentially.  When this op‐
              tion is given, the command in command-line arguments is ignored.

              Only sset and cset are accepted.  Other commands are ignored.  The commands to  un‐
              matched ids are ignored without errors too.

       -h     Help: show syntax.

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

       -R     Use  the  raw  value for evaluating the percentage representation.  This is the de‐
              fault mode.

       -M     Use the mapped volume for evaluating the percentage representation like  alsamixer,
              to be more natural for human ear.

EXAMPLES
       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).

       amixer -c 1 -- sset Master playback -20dB
              will set the master volume of the second card to -20dB.  If the master has multiple
              channels, all channels are set to the same value.

       amixer -c 1 set PCM 2dB+
              will  increase  the PCM volume of the second card with 2dB.  When both playback and
              capture volumes exist, this is applied to both volumes.

       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%

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

SEE ALSO
        alsamixer(1)

BUGS
       None known.

AUTHOR
       amixer is  by  Jaroslav  Kysela  <perex@perex.cz>.   This  document  is  by  Paul  Winkler
       <zarmzarm@erols.com> and Jaroslav Kysela <perex@perex.cz>.

                                           11 Aug 2000                                  AMIXER(1)

Usage: amixer <options> [command]

Available options:
  -h,--help       this help
  -c,--card N     select the card
  -D,--device N   select the device, default 'default'
  -d,--debug      debug mode
  -n,--nocheck    do not perform range checking
  -v,--version    print version of this program
  -q,--quiet      be quiet
  -i,--inactive   show also inactive controls
  -a,--abstract L select abstraction level (none or basic)
  -s,--stdin      Read and execute commands from stdin sequentially
  -R,--raw-volume Use the raw value (default)
  -M,--mapped-volume Use the mapped volume

Available commands:
  scontrols       show all mixer simple controls
  scontents       show contents of all mixer simple controls (default command)
  sset sID P      set contents for one mixer simple control
  sget sID        get contents for one mixer simple control
  controls        show all controls for given card
  contents        show contents of all controls for given card
  cset cID P      set control contents for one control
  cget cID        get control contents for one control