Optical Sound Track
The 1932 film Ornament Sound Experiments is created by experimental filmmaker Oskar Fischinger. He using precise graphical icons in place of the usual waveforms in the soundtrack area of the film, a « synthesized, » or « pure » sound, as Fischinger called it, resulted upon playback.
To create this track, Fischinger cut out templates for each design, then photographed them one frame at a time. When played back at 24fps (frames per second), these images create a wide variety of tonal variations – in essence, synthesized sound.