man/man1/audioctl.1

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 Copyright 2011 Nexenta Systems, Inc. All rights reserved.

 AUDIOCTL 1 "Mar 18, 2011"
 NAME
audioctl - audio device control command line interface
 SYNOPSIS

audioctl list-devices


audioctl show-device [-v] [-d device]


audioctl show-control [-v] [-d device] [control ...]


audioctl set-control [-v] [-d device] control value


audioctl save-controls [-d device] [-f] file


audioctl load-controls [-d device] file


 DESCRIPTION
The audioctl command is used to control various settings and features
of audio devices, including mixer settings such as playback volume and
record gain.


 SUBCOMMANDS
The audioctl command supports the following subcommands.
list-devices

List all the audio devices on the system.


show-device [-v] [-d device] [control ... ]

Display an informational overview of device (or the default device if
not specified). If the -v option is specified, then more detail
will be displayed.


show-control [-v] [-d device]

Display the control settings for one or more controls of a
device (or the default device if not specified). If no control is
specified, then the settings for all controls will be displayed. If
the -v option is specified, then more detail will be displayed.


set-control [-v] [-d device] control value

Set the control settings for a control of a device (or the
default device if not specified) to value. If the -v
option is specified, then more verbose output be displayed.


save-controls [-f] [-d device] file

Save all control settings of the device (or the default device if not
specified) to the named file. This subcommand will not replace
or modify an existing file unless -f (force) is specified.


load-controls [-d device] file

Load previously saved control settings from a file
into a device (or all audio devices if not
specified).


 ENVIRONMENT VARIABLES
AUDIODEV

The full path name of the default audio device to use if on
is not specified on the command line. If this variable is not set,
/dev/audio is used.


 ATTRIBUTES

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


ATTRIBUTE TYPE ATTRIBUTE VALUE
Interface Stability See below.


The audioctl command and its subcommands are Committed. The
names of controls, their values, and device names are Uncommitted.
The display output is intended for human consumption, and is Not An
Interface. The format of the state files used by the
save-controls and load-controls subcommands is Committed
Private.


 SEE ALSO
audioplay(1), audiorecord(1), dsp(7I),
mixer(7I), attributes(5)