1.\" $NetBSD: audioctl.1,v 1.19 2010/05/15 00:08:31 joerg Exp $ 2.\" 3.\" Copyright (c) 1997, 1999 The NetBSD Foundation, Inc. 4.\" All rights reserved. 5.\" 6.\" Author: Lennart Augustsson and Charles M. Hannum 7.\" 8.\" Redistribution and use in source and binary forms, with or without 9.\" modification, are permitted provided that the following conditions 10.\" are met: 11.\" 1. Redistributions of source code must retain the above copyright 12.\" notice, this list of conditions and the following disclaimer. 13.\" 2. Redistributions in binary form must reproduce the above copyright 14.\" notice, this list of conditions and the following disclaimer in the 15.\" documentation and/or other materials provided with the distribution. 16.\" 17.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 18.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 19.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 20.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 21.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27.\" POSSIBILITY OF SUCH DAMAGE. 28.\" 29.Dd January 27, 2002 30.Dt AUDIOCTL 1 31.Os 32.Sh NAME 33.Nm audioctl 34.Nd control audio device 35.Sh SYNOPSIS 36.Nm 37.Op Fl d Ar device 38.Op Fl n 39.Fl a 40.Nm 41.Op Fl d Ar device 42.Op Fl n 43.Ar name ... 44.Nm 45.Op Fl d Ar device 46.Op Fl n 47.Fl w 48.Ar name=value ... 49.Sh DESCRIPTION 50The 51.Nm 52command displays or sets various audio system driver variables. 53If a list of variables is present on the command line, then 54.Nm 55prints the current value of those variables for the specified device. 56If the 57.Fl a 58flag is specified, all variables for the device are printed. 59If the 60.Fl w 61flag is specified 62.Nm 63attempts to set the specified variables to the given values. 64.Pp 65The 66.Fl d 67flag can be used to give an alternative audio control device, the default is 68.Pa /dev/audioctl0 . 69.Pp 70The 71.Fl n 72flag suppresses printing of the variable name. 73.Sh ENVIRONMENT 74.Bl -tag -width AUDIOCTLDEVICE 75.It Pa AUDIOCTLDEVICE 76the audio control device to use. 77.El 78.Sh FILES 79.Bl -tag -width /dev/audioctl0 -compact 80.It Pa /dev/audio0 81audio I/O device (resets on open) 82.It Pa /dev/audioctl0 83audio control device 84.It Pa /dev/sound0 85audio I/O device (does not reset on open) 86.El 87.Sh EXAMPLES 88To set the playing sampling rate to 11025, you can use 89.Dl audioctl -w play.sample_rate=11025 90To set all of the play parameters for CD-quality audio, you can use 91.Dl audioctl -w play=44100,2,16,slinear_le 92Note that many of the variables that can be inspected and changed with 93.Nm 94are reset when 95.Pa /dev/audio0 96is opened. 97This can be circumvented by using 98.Pa /dev/sound0 99instead. 100.Sh COMPATIBILITY 101The old 102.Fl f 103flag is still supported. 104This support will be removed eventually. 105.Sh SEE ALSO 106.Xr audioplay 1 , 107.Xr audiorecord 1 , 108.Xr mixerctl 1 , 109.Xr audio 4 , 110.Xr sysctl 8 111.Sh HISTORY 112The 113.Nm 114command first appeared in 115.Nx 1.3 . 116