There are several different audio mixes for Star Wars:

- 1977 theatrical mono (considered at the time to be the "definitive," or "most complete" mix, with many differences, such as a different voice for Aunt Beru, "Blast it, Wedge," instad of "Biggs," different alarm sounds, etc., etc.) - never officially released on home video, but a fantastic restoration taken from two broadcast sources is available (I have the links to the GOUT-synced restoration if anyone's interested, just PM me)

- 1977 theatrical stereo (I'm not too familiar with the differences here)

- 1977 70mm six-track (equivalent to a 4.2-channel mix - L, C, R, Surround, and two LFE, if I recall correctly) - never released after the theatrical run, though the 1997 SE mixes for all 3 films are based on this mix ("You were lucky to get out of there" instead of "You're lucky you don't taste very good" in ESB)

- 1985 LD remix - the one livserge is talking about. This mix is the one many (if not most) of us here (myself included) grew up with, and is very similar - though not identical - to the theatrical stereo

- 1993 LD remix - the one on the GOUT. This one was available on the 1993 and 1995 LD releases and the 1995 "Faces" VHS set. Many new sounds added, such as glass-breaking sounds in the detention cell block fight, etc.

I'm not an authority on sound mixes, but this is what I remember. Each is distinctly different from the other. I prefer the mono mix myself, and I'm glad Ady restored a lot of mono mix-exclusive things into Revisited.