timdiggerm said:

What....what source are you using? If we're talking about a 5.1 sound mix for a film, your 5 channels are front left, center, front right, rear left and rear right (in some order), plus a 6th channel for the subwoofer ("LFE" or something?) Sound effects, dialogue and music are going to be mixed across all of them, although most dialogue will fall in the front, I think.

Exception: I've heard Clone Wars just keeps dialogue in the center channel.

The source is the widescreen DVDs, i don't think the aspect ratio has anything to do with the sound. But I was able to remove all the sound effects during for my ROTS complete score during the It Can't Be cue scene, where we see part of mustafar and then Anakin crying. Part of the cue that you hear in the scene is unreleased while most is heard on the track Anakin's Dark Deeds.