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MIXER(8)		FreeBSD	System Manager's Manual		      MIXER(8)

     mixer -- set/display soundcard mixer values

     mixer [-f device] [-s | -S] [dev [[+|-]lvol[:[+|-]rvol]]] ...
     mixer [-f device] [-s | -S] recsrc	...
     mixer [-f device] [-s | -S] {^|+|-|=}rec rdev ...

     The mixer utility is used to set and display soundcard mixer device lev-
     els.  It may also be used to start	and stop recording from	the soundcard.
     The list of mixer devices that may	be modified are:

	   vol,	bass, treble, synth, pcm, speaker, line, mic, cd, mix, pcm2,
	   rec,	igain, ogain, line1, line2, line3, dig1, dig2, dig3, phin,
	   phout, video, radio,	and monitor.

     Not all mixer devices are available.

     Without any arguments, mixer displays the current settings	for all	sup-
     ported devices, followed by information about the current recording input
     devices.  If the dev argument is specified, mixer displays	only the value
     for that dev.

     To	modify the mixer value dev, the	optional left and right	channel	set-
     tings of lvol[:rvol] may be specified.  The lvol and rvol arguments may
     be	from 0 - 100.  Omitting	dev and	including only the channel settings
     will change the main volume level.

     If	the left or right channel settings are prefixed	with + or -, the value
     following will be used as a relative adjustment, modifying	the current
     settings by the amount specified.

     If	the -s flag is used, the current mixer values will be displayed	in a
     format suitable for use as	the command-line arguments to a	future invoca-
     tion of mixer (as above).

     The -S flag provides the above output without mixing field	separators.

     To	change the recording device you	use one	of:

	   ^rec	 toggles rdev of possible recording devices

	   +rec	 adds rdev to possible recording devices

	   -rec	 removes rdev from possible recording devices

	   =rec	 sets the recording device to rdev

     The above commands	work on	an internal mask.  After all the options have
     been parsed, it will set then read	the mask from the sound	card.  This
     will let you see EXACTLY what the soundcard is using for the recording

     The option	recsrc will display the	current	recording devices.

     The option	-f device will open device as the mixer	device.

     /dev/mixer	 the default mixer device

     cdcontrol(1), sound(4)

     The mixer utility first appeared in FreeBSD 2.0.5.

     Original source by	Craig Metz <> and Hannu
     Savolainen.  Mostly rewritten by John-Mark	Gurney <>.
     This manual page was written by Mike Pritchard <>.

FreeBSD	13.0			 June 2, 2014			  FreeBSD 13.0


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