When I was sync’ing those vintage audio recordings of the Star Wars In-theatre screenings to the film’s theatrical versions at 23.976fps, I discovered that the speed on these audio recordings would fluctuate—portions would be faster and other would be slower. I had to make copies of these recordings at different speeds and pick parts from these copies to fit the final length. I came up with an edit of the audio-screenings that were serviceable, even though the audio wasn’t sync’d right-down to the millisecond.