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so im not sure if this has been tackled before, but i couldnt find anything specific. I am trying to run 5.1 via digital optical cable from the rear of the motherboard, to a brand new yamaha rx-v477. Under that playback devices tab i cant configure, its all grayed out. I have updated all the drives from gigabytes website. and still no luck. I know this board has upto 7.1 support, but not sure if they are talking about the line outputs and not the spdif. any help is greatly appreciated! cheers!