Jacques Dudon
Jacques Dudon is a French just intonation composer and instrument builder. He is best known for developing a series of photosonic disk (disque photosonique) instruments in the 1980s that produced sound from modulated light (a light source shines through painted glass discs; the resulting patterns of light are picked up by solar cells and converted into a voltage which can then be treated as a sound signal).
Dudon participated as a designer in the development of Semantic Daniélou-53, a free-of-charge software synthesizer with a database of 28 sounds and 72 just intonation scales derived from Alain Daniélou's 53-note tuning system.