Erikstormtrooper said:
Do you know if Hairy_Hen inserted these 70mm differences in his 70mm re-creation mixes?
I didn't have to insert anything for SW, since my version is derived primarily from the 1993 mix, which itself is mostly a downmix of the 70mm audio to begin with. Therefore the differences noted for the first film are already present.
However, there are two sound effects which I am at present unable to say for certain whether they were really part of the original or not. It is likely that they are 1993 additions, but since they appear in the surround channel, and the 70mm recording I have seems to be missing all of its surround effects for some reason, it's impossible to tell. The first is when R2 gets electrified by the Jawas—a pronounced rolling echo in the rear after the shot is fired. The other is during the shot of the Millennium Falcon in hyperspace just before they arrive at Alderaan: there is a sort of 'backdraft' sound just before the camera cuts to the inside of the ship.
The echo reappears in the special edition, although mixed slightly differently, but the other is heard only in the 1993 version. As I said, it's currently impossible to say whether they were added for the laserdisc release, as many other sound effects were, or if they should join the above list of definite changes to the 70mm version from the 35mm. I'm hopeful that I may be able to clear this up, though.
I suppose the LFE elements of the 70mm mix deserve a mention as well, as they often did not merely amplify the low end of the rest of the track but instead contained new discrete bass content. Mostly it was used to reinforce explosions and spaceships, but perhaps the most noticeable and unique instance occurs when the ship is caught by the Death Star's tractor beam: there is a pulsing 60 hz tone while they struggle futilely to break away, and interestingly enough this seems to have been among the loudest bass in the entire movie. (In the SE it is very subdued.)
As for ESB and RotJ, I didn't attempt to duplicate any of the 70mm changes, because I wasn't trying to replicate them exactly; nor did I have adequate sources to do so. With the second film being edited slightly differently there wasn't any point in that, and for the third I didn't bother because I didn't feel like it, to be honest (nor could I guarantee I'd edit the music the same way). So those two more properly reflect the 35mm versions in content, but the 70mm in dynamic range.