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mixer(8) [freebsd man page]

MIXER(8)						    BSD System Manager's Manual 						  MIXER(8)

mixer -- set/display soundcard mixer values SYNOPSIS
mixer [-f device] [-s | -S] [dev [[+|-]lvol[:[+|-]rvol]]] ... mixer [-f device] [-s | -S] recsrc ... mixer [-f device] [-s | -S] {^|+|-|=}rec rdev ... DESCRIPTION
The mixer utility is used to set and display soundcard mixer device levels. It may also be used to start and stop recording from the sound- card. The list of mixer devices that may be modified are: vol, bass, treble, synth, pcm, speaker, line, mic, cd, mix, pcm2, rec, igain, ogain, line1, line2, line3, dig1, dig2, dig3, phin, phout, video, radio, and monitor. Not all mixer devices are available. Without any arguments, mixer displays the current settings for all supported devices, followed by information about the current recording input devices. If the dev argument is specified, mixer displays only the value for that dev. To modify the mixer value dev, the optional left and right channel settings of lvol[:rvol] may be specified. The lvol and rvol arguments may be from 0 - 100. Omitting dev and including only the channel settings will change the main volume level. If the left or right channel settings are prefixed with + or -, the value following will be used as a relative adjustment, modifying the cur- rent settings by the amount specified. If the -s flag is used, the current mixer values will be displayed in a format suitable for use as the command-line arguments to a future invocation of mixer (as above). The -S flag provides the above output without mixing field separators. To change the recording device you use one of: ^rec toggles rdev of possible recording devices +rec adds rdev to possible recording devices -rec removes rdev from possible recording devices =rec sets the recording device to rdev The above commands work on an internal mask. After all the options have been parsed, it will set then read the mask from the sound card. This will let you see EXACTLY what the soundcard is using for the recording device(s). The option recsrc will display the current recording devices. The option -f device will open device as the mixer device. FILES
/dev/mixer the default mixer device SEE ALSO
cdcontrol(1), sound(4) HISTORY
The mixer utility first appeared in FreeBSD 2.0.5. AUTHORS
Original source by Craig Metz <> and Hannu Savolainen. Mostly rewritten by John-Mark Gurney <>. This manual page was written by Mike Pritchard <>. BSD
June 2, 2014 BSD

Check Out this Related Man Page

mixerctl(1)                                                        User Commands                                                       mixerctl(1)

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)
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