Captain Robert April wrote:
I suspect they ran the dialogue through some electronic doohickey, like an early synthesizer or a Fender amp, and manipulated the pitch that way, so's not to effect the speed. Less time intensive than playing with playback speeds, and a lot less hazardous if things don't quite work right. And since the whole deal about the two-parter was to regain some time in the shooting schedule, they'd want to avoid any pitfalls that might blow the schedule.
Doubtful. Tape manipulation is really the most straight forward way to accomplish this. Early synths were clunky and unreliable and Fender amps wouldn't affect pitch..thought I'm willing to bet the reverb tanks were used.
As I explained before, the pitch could be altered with negligable impact on the lip synch.