redirect the audio output to /dev/null Post: 302688089

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LEARN ABOUT MINIX

mixerctl

mixerctl(1)                                                        User Commands                                                       mixerctl(1)

NAME

       mixerctl - audio mixer control command line application

SYNOPSIS

       /usr/sbin/mixerctl [-a | -d dev]  [-iv] [-e | -o]

DESCRIPTION

       Some audio devices support the audio mixer functionality. See mixer(7I) for a complete description of the audio mixer. The mixerctl command
       is used to control the mode of the audio mixer and to get information about the audio  mixer  and  the  audio  device.  See  audio(7I)  for
       details.

OPTIONS

       The following options are supported. If none are specified, option -i is assumed:

       -a              The command applies to all audio devices.

       -d dev          The dev argument specifies an alternate audio control device for the command to use.

       -e              Enables the audio mixer function if the audio device supports it. If supported, the audio mixer may be enabled at any time.
                       The command silently ignores the enable option if the audio mixer is already enabled.

       -i              Prints the audio device type information for the device and indicates whether the audio device uses the audio mixer. If the
                       device does use the audio mixer, this option displays the audio mixer's mode.

       -o              Turns off the audio mixer function if the audio device supports it. If supported, the audio mixer may be turned off if only
                       one process has the device opened with the O_RDWR flag, or, if two different processes have the device opened, one with the
                       O_RDONLY  flag  and the other with the O_WRONLY flag. (See open(2).) The command silently ignores the disable option if the
                       audio mixer function is already disabled.

       -v              Verbose mode. Prints the audio_info_t structure for the device, along with the device type information. This option implies
                       the -i option.

ENVIRONMENT VARIABLES

       AUDIODEV        If  the  -d and -a options are not specified, the AUDIODEV environment variable is consulted. If set, AUDIODEV will contain
                       the full path name of the user's default audio device. The default audio device will be converted into  a  control  device,
                       and then used. If the AUDIODEV variable is not set, /dev/audioctl is used.

FILES

       /dev/audioctl

       /dev/sound/{0...n}ctl

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |Architecture                 |SPARC, x86                   |
       +-----------------------------+-----------------------------+
       |Availability                 |SUNWauda                     |
       +-----------------------------+-----------------------------+
       |Stability Level              |Evolving                     |
       +-----------------------------+-----------------------------+

SEE ALSO

       audioconvert(1), audioplay(1), audiorecord(1), open(2), attributes(5), usb_ac(7D), audio(7I), audio_support(7I), mixer(7I)

SunOS 5.10                                                          12 Mar 2001                                                        mixerctl(1)

10 More Discussions You Might Find Interesting

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redirect stderr to dev/null in bash env.

Discussion started by: Sniper Pixie

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