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This looks interesting. Dutch designer and artist Mariska de Groot has recently developed an undercurrent fascination for straight forms, stroboscopic movement and analogue machines. She started building cinematic instruments and installations based on optical sound–moving form and light to create sound—as soon as she came in contact with the principle of synthetic sound on film.
Earlier this month at the Royal Academy of Art in The Hague, as part of their Graduation Exhibition, de Groot exhibited/performed her piece Quadtone-Lumisonic Rotera.
‘Quadtone – lumisonic rotera’ is a mesmerising light-is-sound projection performance in space. Graphical patterned wheels code a beam of light, which portable light-sensitive speakers convert into audible frequencies. All leftover light is visual sound.
Here is her Light Synth piece in action:
The rotating discs are beautiful in themselves!
CollabCubed 
Very interesting!