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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  con-
	      tents.

       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	decre-
	      mented from the current value, respectively.

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

	      The optional modifiers can be put	as extra parameters to specify
	      the  stream direction or channels	to apply.  The modifiers play-
	      back 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	compo-
	      nents: 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 num-
	      ber.

       -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 sequen-
	      tially.  When this option	is given, the command in  command-line
	      arguments	is ignored.

	      Only  sset  and  cset are	accepted.  Other commands are ignored.
	      The commands to unmatched	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 default mode.

       -M     Use  the mapped volume for evaluating the	percentage representa-
	      tion 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)

NAME | SYNOPSIS | DESCRIPTION | COMMANDS | OPTIONS | EXAMPLES | SEE ALSO | BUGS | AUTHOR

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