Well, there were three 1980 soundtracks depending on how, when and where you saw it. There was the 70mm six-channel mix, the 16mm mono mix, and the stereo mix. The stereo mix is how almost everyone heard it, it’s how everyone heard it on home video until the 1993 home video mix, and it’s also the basis for the default Despecialized six-channel soundtrack.

So if you hear anything like that in Despecialized, it was definitely that way in the most commonly-heard audio mix and in home video mixes prior to 1993 (there may be some channel differences just from how the six-channel mix was constructed, but no content differences like that). I can’t vouch for the other mixes, but DeEd also includes other soundtracks, including the original 16mm mono mix and the 93 mix, so you can see for yourself if it’s there too. The 70mm six-channel mix was supposedly extremely similar to the stereo mix, but went with a different cut of the video, so it’s a bit of a unicorn.

Movies have flaws. Wait until you hear about the missing frame in Empire. You’ll never unsee it, and it’s in every version of the film ever released.

That’s not to say the current version of Empire Despecialized is flawless–there are problems. But the soundtrack? That part’s pretty much perfect (except that the video lags one frame behind it, which is a problem with the video). Not just because hairy_hen did a great job on it (which he did), but because the original 1980 audio was made available to the public in lossless form, so we had excellent-quality raw materials to work with.

EDIT: Found hairy_hen’s comment on this exact issue. Seems like it’s been there on every audio mix and wasn’t removed until the Special Editions:
http://originaltrilogy.com/post/id/724246