So I borrowed my in-laws' BluRay player to decide if I wanted to buy one or not, which I probably will. I popped in Pirates of the Caribbean and switched the output to Dolby Digital EX. It shows as 6.1, and it was my understanding that it should show as 7.1. On the back of the DVD, it shows the sound output as 5.1 Dolby Digital so I know there aren't 2 additional channels I'm missing. So should it say 6.1 or 7.1? My guess is that the receiver created one channel for the back 2 speakers out of the info that was already there, instead of creating 2. I have it hooked up through an HDMI cable, just to clarify.