I have the Sony BDP-S550, using multichannel analog out to a 5.1 receiver. I wasn't getting anything from the rear surrounds, so did some searching here and found that BD Audio Setting needs to be set to Direct. That did the trick! But now an additional question. In a couple places it was mentioned (without confirmation or further discussion) that perhaps the side surround out on the 550 should go to the rear speakers in on the receiver, then in the 550 setup, indicate there are no rears, then the 550 would compensate by mixing side/rear surround into the rear channels. Can anyone confirm if this would be the optimal setup? One thing that has troubled me in the 550 speaker setup is that if I specify there are no side speakers, it automatically disables the rear speakers. I'm not sure how relevant it is that the 550 is configured for a 7.1 setup when I have only 5.1. Should I be concerned?