"In his ‘photosonic’ process, Dudon shines light through a series of semi-transparent, rotating discs that slow and modify the light waves’ frequencies; the resulting waveforms are picked up by photoelectric (solar-power) cells connected to standard analog amplifiers."
Kala Pierson, review in 'New Music Connoisseur Magazine'
This is very interesting music to say the least. I've never heard anything like it. There is more information about the album and Jacques Dudon at http://continuo.wordpress.com/ The incredible blog where I in initially found this album.