mixerctl(1) - NetBSD Manual Pages

MIXERCTL(1)                 NetBSD Reference Manual                MIXERCTL(1)


NAME

     mixerctl - control audio mixing


SYNOPSIS

     mixerctl [-d file] [-n] [-v] -a
     mixerctl [-d file] [-n] [-v] name ...
     mixerctl [-d file] [-n] -w name=value ...
     mixerctl [-d file] [-n] -w name++ ...
     mixerctl [-d file] [-n] -w name-- ...


DESCRIPTION

     The mixerctl command displays or sets various audio system mixing vari-
     ables.  If a list of variables is present on the command line, then
     mixerctl prints the current value of those variables for the specified
     device.  If the -a flag is specified, all variables for the device are
     printed.  If the -w flag is specified mixerctl attempts to set the speci-
     fied variables to the given values.

     The -d flag can be used to give an alternative mixer device, the default
     is /dev/mixer0.

     The -n flag suppresses printing of the variable name.

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

     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 resp. output to the mixer.  The 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.

     The suffixes ++ and -- can be used to step through the values of a mixer
     control.  For numeric controls these operators may increase (resp. de-
     crease) the value by an amount (the delta) suitable to make the control
     assume the next possible value.


ENVIRONMENT

     MIXERDEVICE  the mixer device to use.


FILES

     /dev/mixer0  mixer audio device


EXAMPLES

     The commmand
           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

     audioctl(1), audio(4), sysctl(8)


HISTORY

     The mixerctl command first appeared in NetBSD 1.3.


COMPATIBILITY

     The old -f flag is still supported. This support will be removed eventu-
     ally.

NetBSD 1.6.1                   January 27, 2002                              2