Ebaillargeon82 said:

hairy_hen said:

Well, the negative doesn't have any soundtrack attached to it. The mix would have been recorded onto reels of multitrack tape running in synch with the picture (not the actual negative but a copy, to reduce physical wear and tear), which were then put through further processing and duped onto printmasters for each film format the movie was due to be released in. The 4-track most likely exists as audio only, without any actual film being attached to it.

As a point of interest, the 4-track was also the main source for the 1997 Special Edition mix. If you listen to any part of the movie that hasn't been re-edited or had additional sound effects piled on top of it, you can hear that it is extremely similar to the 35mm stereo and 70mm versions. Because of this, it makes for a much better listening experience than the DVD or Bluray (which are outright terrible).

Speaking of which, are the original 1977 35mm stereo prints, the original 1977 70mm stereo prints, and the original 1977 mono prints all lost, or do prints still exist?

So it's settled. You don't need to worry about whether or not various sound mixes survived, because the original version of Star Wars is a silent film. ;)