Organ Creates Photocell Music (Dec, 1934)
Organ Creates Photocell Music
BUILT from a dishwasher motor, an old keyboard and other gadgets, a homemade organ creates photoelectric music. A film sound track of tones is re-photographed on one of two revolving disks. Beams of light shine through these disks and reach a photocell. The light is then turned into sound, reproducing original tone.





They did it that way for quite some time.
Comment by Casandro — December 16, 2007 @ 3:31 am
As seen at David’s Future Music article:
http://davidszondy.com/future/....._piano.htm
Comment by jayessell — December 16, 2007 @ 8:25 pm