Vladimir Rossiné’s 1916 ‘optophonic piano’

Umatic.nl offers an excellent introduction to /history of optical synthesis. This well-illustrated and complete history starts back in 1822 with Fourier and works its way through topics like hand-drawn movie soundtracks, Wilfred’s color organ, Variophone, Oramics to Xenakis. A don’t miss on the topic.

See also: Graphical Sound, Variophone, Oramics, Oskar Fischinger , Arseny Avraamov, Norman McLaren, color organ, visual music, laser harp, light organ, rhythmicon