The Roger Waters ATD bluray includes the original stereo mix with the original q-sound baked in at 24/96. The CD version as originally released is bright and thin compared to that. I can only speculate about things since I don't have the master tape in front of me. The CD sounds like a hyped bright alteration on the stereo version from the bluray and not the other way around. And I hear what sounds like intentional ambisonic effect from the bluray version that I don't hear from the CD version. (I am aware of the new sound samples from the 2001 soundtrack pasted into the stereo mix. It's the original mix with just those bits mixed into those spots.) It seems like whatever bright eq someone did for the CD broke the q-sound phase tricks baked in.
Anyway, the Q-sound system was monitored when they mixed and it was supposed to translate to a sort of ambisonic folddown of what would have been actual surround. Always with two speakers though even in the original mix studio. "Phantom" surround if you will.
Since the aim was a surround effect, can it be translated to a discrete format and preserve the intended "surround content"?