I have the VP150, M22, QS8, VTF-2 (this all used to be in my profile, but it appears that info was lost during one of the board upgrades).
It does days DD on the receiver, and I could tell that there was sound coming from all 5 speakers. I'll have to see if it is better with a movie tonight, and then if it still isn't good via cable it might just be something with the cable box. They did make me get a new box when I moved, even though it is still Comcast. Since it is a different county, they said the cable system was different so boxes needed to be switched out. I'll have to look up how to get into the cable box settings. I seem to remember an option to change the settings in there.
