.\" Copyright (c) 1997
.\"	Mike Pritchard <mpp@FreeBSD.ORG>.  All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
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.\" 3. Neither the name of the author nor the names of its contributors
.\"    may be used to endorse or promote products derived from this software
.\"    without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY MIKE PRITCHARD AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" $FreeBSD: src/usr.sbin/mixer/mixer.8,v 1.10.2.7 2003/03/11 21:13:51 trhodes Exp $
.\" $DragonFly: src/usr.sbin/mixer/mixer.8,v 1.6 2008/05/02 02:05:08 swildner Exp $
.\"
.Dd January 9, 1997
.Dt MIXER 8
.Os
.Sh NAME
.Nm mixer
.Nd set/display soundcard mixer values
.Sh SYNOPSIS
.Nm
.Op Fl f Ar device
.Op Fl s
.Op Fl h
.Oo
.Ar dev
.Sm off
.Oo
.Op Cm + | -
.Ar lvol
.Op : Oo Cm + | - Oc Ar rvol
.Oc
.Oc
.Sm on
.Ar ...
.Nm
.Op Fl f Ar device
.Op Fl s
.Cm recsrc
.Ar ...
.Nm
.Op Fl f Ar device
.Op Fl s
.Sm off
.Bro
.Cm ^ | + | - | =
.Brc
.Cm rec
.Sm on
.Ar rdev ...
.Sh DESCRIPTION
The
.Nm
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:
.Bd -ragged -offset indent
vol, bass, treble, synth, pcm, speaker, mic, cd, mix,
pcm2, rec, igain, ogain, line1, line2, and line3.
.Ed
.Pp
Not all mixer devices are available.
.Pp
Without any arguments,
.Nm
displays the current settings for all supported devices, followed by information
about the current recording input devices.
If the
.Ar dev
argument is specified,
.Nm
displays only the value for that
.Ar dev .
.Pp
To modify the mixer value
.Ar dev ,
the optional left and right channel settings of
.Ar lvol Ns Op : Ns Ar rvol
may be specified.  The
.Ar lvol
and
.Ar rvol
arguments may be from 0 - 100.  Omitting
.Ar dev
and including only the channel settings will change the main volume level.
.Pp
If the left or right channel settings are prefixed with
.Cm +
or
.Cm - ,
the value following will be used as a relative adjustment, modifying the
current settings by the amount specified.
.Pp
If the
.Fl 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
.Nm
(as above).
.Pp
To change the recording device you use one of:
.Bl -tag -width =rec -offset indent
.It Cm ^rec
toggles
.Ar rdev
of possible recording devices
.It Cm +rec
adds
.Ar rdev
to possible recording devices
.It Cm -rec
removes
.Ar rdev
from possible recording devices
.It Cm =rec
sets the recording device to
.Ar rdev
.El
.Pp
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).
.Pp
The option recsrc will display the current recording devices.
.Pp
The option
.Fl f
.Ar device
will open
.Ar device
as the mixer device.
.Pp
The option
.Fl h
will print a help and exit
.Sh FILES
.Bl -tag -width /dev/mixer -compact
.It Pa /dev/mixer
the default mixer device
.El
.Sh SEE ALSO
.Xr cdcontrol 1
.Sh HISTORY
The
.Nm
utility first appeared in
.Fx 2.0.5 .
.Sh AUTHORS
.An -nosplit
Original source by
.An Craig Metz Aq cmetz@thor.tjhsst.edu
and
.An Hannu Savolainen .
Mostly rewritten by
.An John-Mark Gurney Aq jmg@FreeBSD.org .
This
manual page was written by
.An Mike Pritchard Aq mpp@FreeBSD.org .