hairy_hen: Thanks for the info. :) Since the 93 Definitive Collection laserdisk soundtrack was derived from the real theatrical 70mm soundtrack, plus a few additional effects added, it makes sense to go to a previous theatrical stereo soundtrack (since there's currently no way to access the 70mm soundtrack) and replace those few spots where there were added sounds. And so 70mm "stereo soundtrack" is a good descriptive name for it, since that's what it is, the theatrical 70mm soundtrack down-mixed into stereo form by Lucasfilm for laserdisk.

What is the source for the 35mm stereo soundtrack, a laserdisk set released before the Definitive Collection came out?

In regards to the 1997 SE 5.1 laserdisk soundtrack. One would think that Lucasfilm would have made a more direct transfer of the 70mm theatrical soundtrack this time, since they had 5.1 channels to work with, instead of only 2 in the Definitive Collection. And other than alterations made specifically for the SE, the SE soundtrack should be very close to the 70mm theatrical soundtrack. And since it has discrete channels for all this, it should make for a very nice DD 5.1 soundtrack on DVD. So why not use the 1997 SE as the main source for a recreation of the original 70mm theatrical soundtrack and just replace portions of it with either the 93 DC soundtrack or the 35mm stereo soundtrack where needed to get rid of the 93 DC and 1997 SE soundtrack changes?

Is the .1 LFE channel in the 1997 SE laserdisk set pretty close to what the bass channels in the 70mm theatrical soundtrack sounded like, based on available accounts, did you have to change it much to be more accurate to the 70mm theatrical version?

dark_jedi: As was mentioned earlier, space probably will be an issue because of the various soundtracks, so that has to be considered. I'm sure you'll make the bit-rates as high as possible to fill the disk to the limit, so no problem. :)