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FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
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.\" $NetBSD: uaudio.4,v 1.15 2002/02/12 19:53:57 jdolecek Exp $ .\" .\" Copyright (c) 1999 The NetBSD Foundation, Inc. .\" All rights reserved. .\" .\" This code is derived from software contributed to The NetBSD Foundation .\" by Lennart Augustsson. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" .\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS .\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED .\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR .\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS .\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR .\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF .\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS .\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN .\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE .\" POSSIBILITY OF SUCH DAMAGE. .\" .\" $FreeBSD: release/9.1.0/share/man/man4/snd_uaudio.4 219004 2011-02-24 18:08:23Z hselasky $ .\" .Dd February 24, 2011 .Dt SND_UAUDIO 4 .Os .Sh NAME .Nm snd_uaudio .Nd USB audio and MIDI device driver .Sh SYNOPSIS To compile this driver into the kernel, place the following lines in your kernel configuration file: .Bd -ragged -offset indent .Cd "device sound" .Cd "device usb" .Cd "device snd_uaudio" .Ed .Pp Alternatively, to load the driver as a module at boot time, place the following line in .Xr loader.conf 5 : .Bd -literal -offset indent snd_uaudio_load="YES" .Ed .Sh DESCRIPTION The .Nm driver provides support for .Tn USB audio class devices and .Tn USB MIDI class devices. .Pp A .Tn USB audio device consists of a number of components: input terminals (e.g.\& USB digital input), output terminals (e.g.\& speakers), and a number of units in between (e.g.\& volume control). .Pp Refer to the .Ql USB Audio Class Specification for more information. .Sh SEE ALSO .Xr sound 4 , .Xr usb 4 .Rs .%T "USB Audio Class Specifications" .%U http://www.usb.org/developers/devclass_docs/ .Re .Sh HISTORY The .Nm driver first appeared in .Fx 4.7 . .Sh AUTHORS This manual page was adopted from .Nx 1.6 and modified for .Fx by .An Hiten Pandya Aq hmp@FreeBSD.org . .Sh BUGS The .Tn PCM framework in .Fx , as of this writing, does not handle device un-registrations in a properly abstracted manner, i.e., a detach request is refused by the .Tn PCM framework if the device is in use. It is necessary to allow the device un-registration to complete successfully, otherwise the .Tn PCM layer will panic.