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.