how is sound recorded in a film reel?

Question

when recording of picture is done how does sound gets recorded

Answer 1

when they are making a film, they have an orchestra, singer, or song on a computer, and they will play it during the film until it syncronizes perfectly and has its best sound.

Answer 2

The others are not EXACTLY TOTALLY Wrong, sound is recorded on the film, originally by scratching grooves into the edge near the perforation, this was soon changed to a light system, which passes light that when projected after processing presents it self back into the sound recorded originally, there is also the magnetic way of recording it, uses metal particles and shifts them around to make an extra sound track, just like videotape, but better quality, in terms of how its recorded, the cameras are fitted with a piece of machinery called a crystal sync unit, which has a crystal moving at the exact same number of vibrations as the frame rate is set to and one of the above stated variations records it to the silver bromide on the emulsion and acetate base which provides a perfectly synchronised few seconds of film

Answer 3

1991 - Dolby Stereo Digital (SR-D), with compatible Dolby SR 35mm prints providing both digital and analog optical soundtracks, announced at ShoWest in Las Vegas in February as the first application of Dolby AC-3 multi-channel digital audio coding; the SR-D digital sound film format added 6 digital optical tracks, recorded between sprocket holes, to the 4 existing Dolby SR analog optical tracks on the edges of the film strip - SR-D has a compression ratio of 10:1, a dynamic range 120db, a frequency response of 20-20,000Hz, and a 16-bit data rate of 384 kb.