NetBSD/usr.bin/mixerctl/mixerctl.1

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.\" $NetBSD: mixerctl.1,v 1.11 2000/12/29 13:30:26 augustss Exp $
.\" Copyright (c) 1997 The NetBSD Foundation, Inc.
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.\" Author: Lennart Augustsson
.\"
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.Dd May 4, 1997
.Dt MIXERCTL 1
.Os
.Sh NAME
.Nm mixerctl
.Nd control audio mixing
.Sh SYNOPSIS
.Nm
.Op Fl f Ar file
.Op Fl n
.Op Fl v
.Fl a
.Nm ""
.Op Fl f Ar file
.Op Fl n
.Op Fl v
.Ar name ...
.Nm ""
.Op Fl f Ar file
.Op Fl n
.Fl w
.Ar name=value ...
.Nm ""
.Op Fl f Ar file
.Op Fl n
.Fl w
.Ar name++ ...
.Nm ""
.Op Fl f Ar file
.Op Fl n
.Fl w
.Ar name-- ...
.Sh DESCRIPTION
The
.Nm
command displays or sets various audio system mixing variables.
If a list of variables is present on the command line, then
.Nm
prints the current value of those variables for the specified device.
If the
.Fl a
flag is specified, all variables for the device are printed.
If the
.Fl w
flag is specified
.Nm
attempts to set the specified variables to the given values.
.Pp
The
.Fl f
flag can be used to give an alternative mixer device, the default is
.Pa /dev/mixer0 .
.Pp
The
.Fl n
flag suppresses printing of the variable name.
.Pp
The
.Fl v
flag shows the possible values of enumeration and set valued
variables. Enumerated values are shown in [] and set values
are shown in {}.
.Pp
The exact set of controls that can be manipulated depends on
the mixer. The general format (in both getting and setting a value)
is
.br
.Va "class.name" = value
.br
The
.Va class
can have values like
.Li inputs
or
.Li outputs
indicating that the control affects the input resp. output to the
mixer. The
.Va name
indicates what part of the mixer the control affects.
Continous mixer values, e.g., volume, have numeric values
in the range 0-255. If value can be set for each channel independently
the values are printed separated by commas. Discrete mixer values, e.g.,
the recording source, have symbolic names. Depending on the mixer it
may either be an enumeration or a set.
.Pp
The suffixes ++ and -- can be used to step through the values of a
mixer control. For numeric controls these operators may increase
(resp. decrease) the value by an amount (the delta) suitable to make
the control assume the next possible value.
.Sh EXAMPLES
The commmand
.Dl "mixerctl -a -v"
can produce
.Bd -literal
inputs.mic=0,0 volume
inputs.mic.mute=off [ off on ]
inputs.cd=220,220 volume
inputs.cd.mute=off [ off on ]
inputs.dac=220,220 volume
inputs.dac.mute=off [ off on ]
record.record=220,220 volume
record.record.source=mic [ mic cd dac ]
monitor.monitor=0 volume
.Ed
.Sh FILES
.Bl -tag -width /dev/mixer0
.It Pa /dev/mixer0
mixer audio device
.El
.Sh ENVIRONMENT
.Bl -tag -width MIXERDEVICE
.It Pa MIXERDEVICE
the mixer device to use.
.El
.Sh SEE ALSO
.Xr audioctl 1 ,
.Xr audio 4 ,
.Xr sysctl 8
.Sh HISTORY
The
.Nm
command first appeared in
.Nx 1.3 .