hmm i have this motherboard
it says "AI AUDIO (6-channel digital audio)
AI series motherboards employed the world's first intelligent audio CODEC. The 6-channel AD1985 audio CODEC automatically detects and identifies what types of peripherals are plugged into the audio I/O jacks and notifies users of inappropriate connection, meaning there will be no more confusion of Line-in, Line-out and Mic jacks."
so the center speakers supposed to work without matrix on?? well in NFS all the speakers and the sub work...but the center speaker doesnt, unless matrix is on....i thought my onboard sound would be good enuff for this...