1.\" $NetBSD: audioctl.1,v 1.13 1999/04/02 15:53:39 augustss 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.\" 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 February 18, 1999 37.Dt AUDIOCTL 1 38.Os 39.Sh NAME 40.Nm audioctl 41.Nd control audio device 42.Sh SYNOPSIS 43.Nm 44.Op Fl f Ar file 45.Op Fl n 46.Fl a 47.Nm "" 48.Op Fl f Ar file 49.Op Fl n 50.Ar name ... 51.Nm "" 52.Op Fl f Ar file 53.Op Fl n 54.Fl w 55.Ar name=value ... 56.Sh DESCRIPTION 57The 58.Nm 59command displays or sets various audio system driver variables. 60If a list of variables is present on the command line, then 61.Nm 62prints the current value of those variables for the specified device. 63If the 64.Fl a 65flag is specified, all variables for the device are printed. 66If the 67.Fl w 68flag is specified 69.Nm 70attempts to set the specified variables to the given values. 71.Pp 72The 73.Fl f 74flag can be used to give an alternative audio control device, the default is 75.Pa /dev/audioctl0 . 76.Pp 77The 78.Fl n 79flag suppresses printing of the variable name. 80.Sh EXAMPLES 81To set the playing sampling rate to 11025, you can use 82.Dl audioctl -w play.sample_rate=11025 83To set all of the play parameters for CD-quality audio, you can use 84.Dl audioctl -w play=44100,2,16,slinear_le 85Note that many of the variables that can be inspected and changed 86with 87.Nm 88are reset when 89.Pa /dev/audio0 90is opened. This can be circumvented by using 91.Pa /dev/sound0 92instead. 93.Sh FILES 94.Bl -tag -width /dev/audioctl0 -compact 95.It Pa /dev/audio0 96audio I/O device (resets on open) 97.It Pa /dev/audioctl0 98audio control device 99.It Pa /dev/sound0 100audio I/O device (does not reset on open) 101.El 102.Sh ENVIRONMENT 103.Bl -tag -width AUDIOCTLDEVICE 104.It Pa AUDIOCTLDEVICE 105the audio control device to use. 106.El 107.Sh SEE ALSO 108.Xr audioplay 1 , 109.Xr audiorecord 1 , 110.Xr mixerctl 1 , 111.Xr audio 4 , 112.Xr sysctl 8 113.Sh HISTORY 114The 115.Nm 116command first appeared in 117.Nx 1.3 . 118