this is really dumb of me but only just noticed so thought would share - just watching Angels and Demons on bluray with my onyko 876 7.1 setup and my amp is playing the dts master audio soundtrack and set itself to hd master audio from neural thx 7.1 and knocked my amp back to 5.1 not 7.1 i've been watching films like this for months and since have large room and normally sat down by time movies start i've never noticed doh!!!!