I was going through one of my "music" hard drives, and found the 5.1 wav files from this DVD, I originally used them to make a DTS CD for the car. This was quite some time ago, and I honestly had not revisted these files or that CD for quite some time.
Anyway, I pulled up the files into Sound Forge and refreshed my memory on the audio tracks. This actually is a fairly discrete mix, although it is mostly a 3 channel surround mix. The rears are used mostly for sound effects. However, there is a great deal of seperation between the center channel and the two front channels.
Upon quick review, in "Another Brick in the Wall, Pt 2", the kids chorus is only in the fronts, not in the center or rears, and the "teacher" is isolated in the center. "Go on do it again" and "How can you have any pudding if you don't eat your meat" are solo in the center. Listen to the fronts and you don't get him.
Other songs have Roger Waters vocals very discinct in the center, with sort of an "echoed" vocal in the fronts. The center is not vocal solo, however, there are some instruments in there as well.
Looking at the wav files in sound forge, you can see that this is indeed a very true 5.1 soundtrack, and although it is not a "full surround" mix for the music, it is multichannel.
If you haven't listened to this one in a while, give it a spin. In today's dearth of surround releases, sometimes it pays to go back to an old standard!
Today I would have to rate this a 9. I love the music, it sounds great, and the mix is pretty damn discrete. (Now, if AP did the surround, well...............)