I've just got a Sony STRDB790 receiver, and I've noticed that if I use 'AFD Auto' with my NTL cable, I only get stereo sound. The same if I select 'Dolby Pro Logic'. The only way to get the rear channels to output something is to use DPL2 or DTS Neo . However, things seem to work perfectly with a DVD. Any ideas what's going on? Is this a 'feature' of the STRDB790' ? Thanks, Dave.