I'm not a projectionist, but: - sound is either on the same reel or on a DTS disc synced to the reel. - I was surprised that a rather small theater in my metr

I'm not a projectionist, but: - sound is either on the same reel or on a DTS disc synced to the reel. - I was surprised that a rather small theater in my metro area (no stadium seating, out in the boonies) has digital projectors in all of its screening auditoriums. For modern movies, I would imagine that in 10 years or less there will be no more acetate prints and all distribution will be digital. For digital prints framerate is solely limited by the response rate of the projector and the throughput available in the playback system.