MAVB(4) OpenBSD Programmer's Manual (SGI) MAVB(4)NAMEmavb - Moosehead A/V Board audio device
SYNOPSIS
mavb0 at macebus0
audio* at mavb?
DESCRIPTION
The mavb driver provides support for the Moosehead A/V Board found on SGI
O2 machines.
The Moosehead A/V Board uses an AD1843 codec that supports 8- and 16-bit
audio sample recording and playback at rates from 5 to 54 kHz, with 1 Hz
resolution. The mavb driver also makes it possible to control the
playback volume by using the buttons on the front of the O2.
SEE ALSOaudio(4), intro(4), macebus(4)HISTORY
The mavb driver first appeared in OpenBSD 3.7.
AUTHORS
The mavb driver was written by Mark Kettenis.
CAVEATS
The analog mixer in the AD1843 codec does not provide a master volume
control. Therefore, the O2 volume buttons only control the output volume
of the DAC.
BUGS
Currently only sample rates up to 48 kHz are supported. The second DAC
on the AD1843 codec sits idle.
OpenBSD 4.9 November 18, 2009 OpenBSD 4.9