MIXER(8)

NAME
mixer - set/display soundcard mixer values

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

DESCRIPTION
The mixer command is used to set and display soundcard mixer device levels. 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, mic, cd, mix, pcm2, rec, igain, ogain, line1, line2, and line3.

Not all mixer devices are available.

When mixer is run without any arguments, all supported devices are displayed along with current values. If the dev argument is specified, the value for the dev device will be displayed.

To modify the mixer value dev, the optional left and right channel settings of lvol[:rvol] may be specified. The lvol and rvol arguments may be from 0 - 100.

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 device(s).

The option recsrc will display the current recording devices.

The option -f device will open device as the mixer device. This will ONLY work if the -f option is immediately after the mixer command.

FILES
/dev/mixer
    The default mixer device.

SEE ALSO
cdcontrol(1), cdplay(1)

HISTORY
The mixer command first appeared in FreeBSD 2.0.5.

AUTHORS
Original source by Craig Metz <cmetz@thor.tjhsst.edu> and Hannu Savolainen. Mostly rewriten by John-Mark Gurney <jmg@FreeBSD.org>. This manual page was written by Mike Pritchard <mpp@FreeBSD.org>.