Maybe this is irrelevant to the topic and completely useless but it seems to be the patent for the audio subsystem of the AAA chipset
http://www.freepatentsonline.com/5418321.html
8 channels, 8/16-bit samples, up to 110 kHz sampling rate, 8-bit volume, channels freely allocated to the left/right/both stereo channels (sadly no real panning).