Finnish engineer Eric Tigerstedt successfully recorded sound on film using a device of his own invention, the photomagnetophone, ten years before there were any advances in commercial cinema—in 1914. These are the original surviving tests.
Finnish engineer Eric Tigerstedt successfully recorded sound on film using a device of his own invention, the photomagnetophone, ten years before there were any advances in commercial cinema—in 1914. These are the original surviving tests.