It is related to the Logic 7 used on Lexicon's processors, but I believe it is a "scaled down" version (at least it was on the first H/K receivers that had it) -- rather than producing a discrete 7.1 mix it produced a 5.1 mix from stereo sources. I don't know if that is still true on their newest units or not; I think they may have started supporting 7.1 output from Logic 7 on newer units. It's been discussed at length on several occasions at Home Theater Forum, but I never kept real close tabs on it.

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