mixer(8)

NAME

mixer - set/display soundcard mixer values

SYNOPSIS

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

DESCRIPTION

The mixer utility 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.

Without any arguments, mixer displays the current settings

for all supported 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 settings of lvol[:rvol] may be specified. The lvol and rvol

arguments may
be from 0 - 100. Omitting dev and including only the chan

nel 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 invocation 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
device(s).

The option recsrc will display the current recording de

vices.

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

FILES

/dev/mixer the default mixer device

SEE ALSO

cdcontrol(1)

HISTORY

The mixer utility first appeared in FreeBSD 2.0.5.

AUTHORS

Original source by Craig Metz <cmetz@thor.tjhsst.edu> and

Hannu
Savolainen. Mostly rewritten by John-Mark Gurney

<jmg@FreeBSD.org>.
This manual page was written by Mike Pritchard <mpp@FreeB

SD.org>.

BSD April 13, 2005

BSD