Tonewheel – Photosonique discs


An amazingly complicated optical tonewheel.  Not sure who this is made by exactly, though it’s either Jacques Dudon, Daniel Arfib, or Patrick Sanchez.  Collectively, this group made over 1,000 different discs as of 2003.

Via: The Process Photosonique (English translation here) – includes information on making optical “comb filters” for interacting with these discs.

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