From someone who has never had anything even like Audyssey, I can understand what Trinnov is claiming to be able to do for a full 5.1 or 7.1 system with a 5.1 or 7.1 program. But does Trinnov have any effect (positive or otherwise) on a normal stereo program? Does it have to run all speakers to work? Can it do room compensation say if you just play a CD with only your front L&R and sub running? It might be nice to be able to flatten bass response in 2.1.