Hi Guys, great forum! I have just purchased my first surround sound set up; Sony STR-DH820 AV and Boston Accoustics SoundWare XS 5.1. So far this is being fed by my Virgin V+ box and Apple TV. Depending on what channel I am watching I get a variety of format names appearing on the AV display. They are as follows: LPCM 48 Dolby Digital 2.0 Dolby Digital 5.1 I have a number of 'sound field' options: AFD Auto Multi ST HD DCS PLII MV NE06 CIN I currently understand none of this, should I be choosing the sound field option based on the format coming in? If so what goes with what. I have read the manual a few times but its beyond me at the moment. Would appreciate any advise.