ArcAttack, previously covered here use Tesla Coils to make music. Gizmodo interviews them about their work:
Gizmodo: What does your setup consist of?
Joe: It would be two DRSSTC (Dual Resident Solid State Tesla Coil) units which are MIDI controlled. There’s a fiber optic cable running to some digital logic boards that are in the Tesla coils.
John: The Open Labs MiKO MIDI console hosts the PC Software (Fruity Loops) that we use to actually sequence the music.
The MiKO is just a Windows machine with a bunch of nice MIDI interfaces, cased in metal—which is nice because we have a lot of EMF emitted from the coils. I actually used to run it off my laptop, but it would crash all the time.
Patrick: The drum machine has a solenoid for every drum, and they’re MIDI controlled also…from the MiKO.