Okay, here is the setup. Sony STR-DB790 Sony 28FX68 > RECEIVER (phono) Sony NS405 > TV (rgb), RECEIVER (coaxial) Tannoy R2's (bi-wired) The receiver is default 'A.F.D Auto', which can discern the DVD's encoding... When I play the majority of my films, A.F.D chooses Dolby Pro Logic 3/2.1 On the display it show L and R with squares around them, then a C between with no square, then LS and RS with no square. According to the manual the square shows what the film is being downmixed too. NOTE there is no SW present. It also shows LFE, which according to the manual means the disc is producing a seperate LFE range. Now subwoofer is set to 'No', the fronts are set to 'Large'. So does the LFE indicate that the bi-wiring is in effect, and that its sending the LFE to the speakers? On the speaker setup on the receiver, I have set it to 2.0... On the NS405, I have set DTS to 'On'. On Terminator 3 in the audio setup, I can choose DD 5.1 or DTS. If my understanding is correct, DTS and DD 5.1 are identical, both being discrete? If this is the case, what are the benefits? Switching between both, it seems DTS is slightly louder.