I'd have to say I'm a bit confused about the matrixed sound formats and what they do. I have a 5.1 setup so do they even effect me or does that mean that my processor will make a 7.1 mix into 5.1? Not sure obviously. If someone could explain this to me and others with similar questions it would be much appreciated. I have a T752 so others with the same or similar models or modes of operation feel free to explain what it can do.