116 lines
3.2 KiB
Groff
116 lines
3.2 KiB
Groff
.\" $NetBSD: audioctl.1,v 1.19 2010/05/15 00:08:31 joerg Exp $
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.\"
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.\" Copyright (c) 1997, 1999 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" Author: Lennart Augustsson and Charles M. Hannum
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd January 27, 2002
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.Dt AUDIOCTL 1
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.Os
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.Sh NAME
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.Nm audioctl
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.Nd control audio device
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.Sh SYNOPSIS
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.Nm
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.Op Fl d Ar device
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.Op Fl n
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.Fl a
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.Nm
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.Op Fl d Ar device
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.Op Fl n
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.Ar name ...
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.Nm
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.Op Fl d Ar device
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.Op Fl n
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.Fl w
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.Ar name=value ...
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.Sh DESCRIPTION
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The
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.Nm
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command displays or sets various audio system driver variables.
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If a list of variables is present on the command line, then
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.Nm
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prints the current value of those variables for the specified device.
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If the
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.Fl a
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flag is specified, all variables for the device are printed.
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If the
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.Fl w
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flag is specified
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.Nm
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attempts to set the specified variables to the given values.
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.Pp
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The
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.Fl d
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flag can be used to give an alternative audio control device, the default is
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.Pa /dev/audioctl0 .
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.Pp
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The
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.Fl n
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flag suppresses printing of the variable name.
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.Sh ENVIRONMENT
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.Bl -tag -width AUDIOCTLDEVICE
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.It Pa AUDIOCTLDEVICE
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the audio control device to use.
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.El
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.Sh FILES
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.Bl -tag -width /dev/audioctl0 -compact
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.It Pa /dev/audio0
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audio I/O device (resets on open)
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.It Pa /dev/audioctl0
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audio control device
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.It Pa /dev/sound0
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audio I/O device (does not reset on open)
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.El
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.Sh EXAMPLES
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To set the playing sampling rate to 11025, you can use
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.Dl audioctl -w play.sample_rate=11025
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To set all of the play parameters for CD-quality audio, you can use
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.Dl audioctl -w play=44100,2,16,slinear_le
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Note that many of the variables that can be inspected and changed with
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.Nm
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are reset when
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.Pa /dev/audio0
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is opened.
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This can be circumvented by using
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.Pa /dev/sound0
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instead.
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.Sh COMPATIBILITY
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The old
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.Fl f
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flag is still supported.
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This support will be removed eventually.
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.Sh SEE ALSO
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.Xr audioplay 1 ,
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.Xr audiorecord 1 ,
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.Xr mixerctl 1 ,
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.Xr audio 4 ,
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.Xr sysctl 8
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.Sh HISTORY
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The
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.Nm
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command first appeared in
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.Nx 1.3 .
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