Wiardgroup

I know a fellow who used to perform a live soundtrack to the film "Metropolis" on a 3-panel serge controlled by the old EMU computerized keyboard/sequencer and a spring-reverb.
The spring reverb was physically suspended at 4 points He struck it with various types of percussion mallets. The output was used a a CONTROL voltage for a bunch of other parameters during the film. He also routed the CV to a a tape recorder that he used as a a loop/delay processor for the CV