Yes they do but it's Matrixed.....at least on some DVD's I have tried. I'm still on the fence with 7.1. I had M80's up front with QS8's for surrounds and M22's for the EX channels and even movies encoded with EX didn't add much as far as I was concerned. I still think 7.1, 8.1 etc etc is more marketing then anything else. A good bud of mine went from a true 9.1 system down to good old 5.1 again and he is far happier.....I also did the same thing and have never looked back.