Spiky its clear you know more about this than me. I guss what im trying to find out is why some Dolby Digital EX DVDs send a seperate signal to the back center speaker and some do not. For example The Terminator special edition and T2 the ultimate edition both are in EX. when playing T1 the light on my av reciever that shows a seperate signal is going to the B/C speaker does not lite and when playing T2 it does and I have not changed any settings. What do you think? Also I have a new question (looks like im full of them) I have noticed when playing some DVDs they are in DTS NEO:6 what can you tell me about this? ---cope---