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UAUDIO(4) BSD 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. BSD November 10, 2003 BSD
NAME | SYNOPSIS | DESCRIPTION | SEE ALSO | HISTORY | AUTHORS | BUGS
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