I have a Soundblaster Audigy 1 with a Creative 5.1 speaker set up. Whenever I play a DVD or Music disc it only plays it in 4 channel with the sub and nothing out of the centre. I have tried all the different settings and even tried a different program. Also if I switch the settings to SPDIF Windows Xp takes a memory dump. I can play Call of Duty in 5.1 but when I play Doom 3 in 5.1 it makes a crackling background noise. Can anybody help me please.