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The difference between that and DPLII(or x), which I use most commonly for any type of two-channel material, is that the DPLII processing detects the phase differences in the reflected sound which has been mixed into the two front channels(there was no place else to put it) although it originally came from directions other than the front at the actual performance. It then extracts the out-of-phase material which represents reflections that came from the sides and back and steers it to the surrounds where it belongs. The result is a little closer to the live listening experience.



That is too cool! What about Neo? Any idea how that works?

I'll have to check out the room response using DPLx and Neo to contrast the difference to 7-channel stereo. More measurements for my daughter .