i DONT KNOW IF THIS IS THE RIGHT PLACE TO PLACE THIS TREAT. I was under the impression that Dolby EX automatically meant 6.1. Today I rented employee of the month (my wife wanted to see it) and the box says Dolby EX 5.1?? I figured maybe it will matrix to the center back speaker... I have not seen the movie yet but I put it on for a second just to see if the receiver will run the 6th channel and it didn’t. The Dolby ex light goes on but the center back speaker is not activated... what is the difference between regular Dolby 5.1 surround and Dolby ex 5.1?????