How is sound recorded on motion picture film?

Sound Recording and Reproduction (Sound on Film) (1943)

Experimentation with Sound

Westworld computer Computer, Westworld, Computer monitor

How Video Formatting Works

The History of Sound at the Movies

AES E-Library » Feasibility of Digital Sound on Motion Picture Film

Movie magic: How Foley artists create the sounds behind your favourite films

The First Sound Film Was NOT The Jazz Singer

Pin de Paolo Pasqualini em magnetofoni

Movie Industry, HowStuffWorks

Movies & Film, HowStuffWorks