How does digital and analog audio printed 35mm and 70mm film work?

I’ve recently watched Oppenheimer on 35mm and 2001: A Space Odyssey on 70mm film and wondered how the audio works when it is printed on the film.

Does the film go through another machine before going through the projector?

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jasparagus@lemmy.world
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It is a bit lengthy but well worth a watch

This was how I knew it was a Technology Connections video before I clicked haha. His stuff is always so informative and interesting.

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