Posted this in another area with no response, so let's try it here. For the hell of it, I played the THX audio tests on Disney's Lilo And Stitch tonight on my Onkyo SR600 receiver. Here's my beef: On the phase tests, it says the in-phase sound for the surrounds should come from the rear center channel... which it does. So far, so good. However, it also says that the out-of-phase sound for the surrounds should come from the right and left surrounds in an EX system. During the out-of-phase portion, I get a barely audible hiss instead of sound from the left and right surrounds, almost as if the receiver was cancelling out out-of-phase data during processing. Checked it out with Avia's speaker phase tests with the same results. So is out-of-phase surround data supposed to be removed by the EX processing, or is the Onkyo faulty in some way? It would seem to me that with the THX test saying that out-of-phase data should come from the side surrounds and it not actually working that way, perhaps there is a problem with the way this unit decodes DD-EX. Anyone have any ideas?