audioctl(1) - NetBSD Manual Pages

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AUDIOCTL(1)                 NetBSD Reference Manual                AUDIOCTL(1)


NAME

     audioctl - control audio device


SYNOPSIS

     audioctl [-f file] [-n] -a
     audioctl [-f file] [-n] name ...
     audioctl [-f file] [-n] -w name=value ...


DESCRIPTION

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

     The -f flag can be used to give an alternative audio control device, the
     default is /dev/audioctl0.

     The -n flag suppresses printing of the variable name.


EXAMPLES

     To set the playing sampling rate to 11025, you can use
           audioctl -w play.sample_rate=11025
     To set all of the play parameters for CD-quality audio, you can use
           audioctl -w play=44100,2,16,slinear_le
     Note that many of the variables that can be inspected and changed with
     audioctl are reset when /dev/audio0 is opened.  This can be circumvented
     by using /dev/sound0 instead.


FILES

     /dev/audio0     audio I/O device (resets on open)
     /dev/audioctl0  audio control device
     /dev/sound0     audio I/O device (does not reset on open)


ENVIRONMENT

     AUDIOCTLDEVICE  the audio control device to use.


SEE ALSO

     audioplay(1), audiorecord(1), mixerctl(1), audio(4), sysctl(8)


HISTORY

     The audioctl command first appeared in NetBSD 1.3.

NetBSD 1.5.1                   February 18, 1999                             1