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UAUDIO(4)	       FreeBSD Kernel Interfaces Manual		     UAUDIO(4)

NAME
     uaudio -- USB audio device	driver

SYNOPSIS
     device pcm
     device usb

DESCRIPTION
     The uaudio	driver provides	support	for USB	audio class devices.

     A 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).

     Refer to the `USB Audio Class Specification' for more information.

SEE ALSO
     pcm(4), usb(4)

     USB Audio Class Specifications,
     http://www.usb.org/developers/devclass_docs/.

HISTORY
     The uaudio	driver first appeared in appeared in FreeBSD 4.7.

AUTHORS
     This manual page was adopted from NetBSD 1.6 and modified for FreeBSD by
     Hiten Pandya <hmp@FreeBSD.org>.

BUGS
     The PCM framework in FreeBSD, as of this writing, does not	handle device
     un-registrations in a properly abstracted manner, i.e. a detach request
     is	refused	by the PCM framework if	the device is in use.  For USB and
     supposedly	other detach-able busses, it is	necessary to allow the device
     un-registration to	complete successfully, otherwise the driver leaves
     wild pointers to invalid data structures and thus leading to a panic.

FreeBSD	10.1		       November	10, 2003		  FreeBSD 10.1

NAME | SYNOPSIS | DESCRIPTION | SEE ALSO | HISTORY | AUTHORS | BUGS

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<http://www.freebsd.org/cgi/man.cgi?query=uaudio&sektion=4&manpath=FreeBSD+5.2-RELEASE>

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