1.\" $OpenBSD: audioctl.1,v 1.19 2004/07/30 11:48:58 jmc Exp $ 2.\" $NetBSD: audioctl.1,v 1.7 1998/04/27 16:55:23 augustss Exp $ 3.\" Copyright (c) 1997 The NetBSD Foundation, Inc. 4.\" All rights reserved. 5.\" 6.\" Author: Lennart Augustsson 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.\" 3. All advertising materials mentioning features or use of this software 17.\" must display the following acknowledgement: 18.\" This product includes software developed by the NetBSD 19.\" Foundation, Inc. and its contributors. 20.\" 4. Neither the name of The NetBSD Foundation nor the names of its 21.\" contributors may be used to endorse or promote products derived 22.\" from this software without specific prior written permission. 23.\" 24.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 25.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 26.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 27.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 28.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 29.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 30.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 31.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 32.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 33.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 34.\" POSSIBILITY OF SUCH DAMAGE. 35.\" 36.Dd May 4, 1997 37.Dt AUDIOCTL 1 38.Os 39.Sh NAME 40.Nm audioctl 41.Nd control audio device 42.Sh SYNOPSIS 43.Nm audioctl 44.Op Fl f Ar file 45.Op Fl n 46.Fl a 47.Nm audioctl 48.Op Fl f Ar file 49.Op Fl n 50.Ar name 51.Op Ar ... 52.Nm audioctl 53.Op Fl f Ar file 54.Op Fl n 55.Ar name Ns = Ns Ar value 56.Op Ar ... 57.Sh DESCRIPTION 58The 59.Nm 60command displays or sets various audio system driver variables. 61If a list of variables is present on the command line, 62.Nm 63prints the current value of those variables for the specified device. 64By default, 65.Nm 66operates on the 67.Pa /dev/audioctl 68device. 69.Pp 70The options are as follows: 71.Bl -tag -width "name=valueXX" 72.It Fl a 73Print all device variables and their current values. 74.It Fl f Ar file 75Specify an alternative audio control device. 76.It Fl n 77Suppress printing of the variable name. 78.It Ar name Ns = Ns Ar value 79Attempt to set the specified variable 80.Ar name 81to 82.Ar value . 83.El 84.Sh ENVIRONMENT 85.Bl -tag -width AUDIOCTLDEVICE 86.It Ev AUDIOCTLDEVICE 87Audio control device to use. 88.El 89.Sh FILES 90.Bl -tag -width /dev/audioctl 91.It Pa /dev/audioctl 92default audio control device 93.El 94.Sh EXAMPLES 95To set the playing sampling rate to 11025 you can enter: 96.Pp 97.Dl $ audioctl play.sample_rate=11025 98.Pp 99Note that many of the variables that can be inspected and changed 100are reset when the 101.Pa /dev/audio 102device is opened. 103This can be circumvented like so: 104.Pp 105.Dl $ (cat file.au; audioctl -f /dev/audioctl -a) \*(Gt /dev/audio 106or 107.Bd -literal -offset indent -compact 108$ (audioctl -f /dev/audioctl blocksize=1024; cat file.au) \e 109 \*(Gt /dev/audio 110.Ed 111.Sh SEE ALSO 112.Xr aucat 1 , 113.Xr cdio 1 , 114.Xr mixerctl 1 , 115.Xr audio 4 , 116.Xr sysctl 8 117.Sh HISTORY 118The 119.Nm 120command first appeared in 121.Nx 1.3 . 122