Hammond organs used spinning tonewheels until 1972. Here they are
doing pretty much the same thing with the optical patterns on the
spinning disks, which from what I can tell are just sine, sawtooth,
and square. The novel thing would appear to be they also have a
pickup on the spinning motor coils; not sure what waveform that
would generate but I would expect some form of sinusoid. Fun
though, and hey Jean-Michel likes it.
Cheers!
- Lorne
Lorne Covington
NOIRFLUX - Art in Interaction
http://noirflux.com