MirBSD manpage: mixerctl(1)

MIXERCTL(1)                  BSD Reference Manual                  MIXERCTL(1)

NAME

     mixerctl - control audio mixing

SYNOPSIS

     mixerctl [-nv] [-f file] -a
     mixerctl [-nv] [-f file] name [...]
     mixerctl [-q]  [-f file] name=value [...]

DESCRIPTION

     The mixerctl command displays or sets various audio system mixing vari-
     ables. If a list of variables is present on the command line, mixerctl
     prints the current value of those variables for the specified device. By
     default, mixerctl operates on the /dev/mixer device.

     The options are as follows:

     -a       Print all device variables and their current values.

     -f file  Specify an alternative audio mixing device.

     -n       Suppress printing of the variable name.

     -q       Suppress all printing when setting a variable.

     -v       Show the possible values of enumeration and set valued vari-
              ables. Enumerated values are shown in "[]" and set values are
              shown in "{}".

     name=value
              Attempt to set the specified variable name to value.

     Values may be specified in either absolute or relative forms. The rela-
     tive form is indicated by a prefix of '+' or '-' to denote an increase or
     decrease, respectively.

     The exact set of controls that can be manipulated depends on the mixer.
     The general format (in both getting and setting a value) is

           class.name=value

     The class can have values like inputs or outputs indicating that the con-
     trol affects the input or output, respectively, to the mixer. The name
     indicates what part of the mixer the control affects. Continuous 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 enumera-
     tion or a set.

ENVIRONMENT

     MIXERDEVICE  The audio mixer device to use.

FILES

     /dev/mixer  default mixer audio device

EXAMPLES

     The command

           $ mixerctl -a -v

     can produce

           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

SEE ALSO

     aucat(1), audioctl(1), cdio(1), audio(4), mixerctl.conf(5), sysctl(8)

HISTORY

     The mixerctl command first appeared in NetBSD 1.3.

MirBSD #10-current               May 4, 1997                                 1