Audio experimenter Novus has made a high-voltage music player using an ignition coil, seemingly outputting musical notes with lightening itself! In the video he demos the device and explains how a speaker works, illustrating the magnetic field interacting with a coil. He explains whats happening in more detail in a follow up video:
Jason Hotchkiss of Sixty Four Pixels also made a Tesla Coil Organ using two solid state coils with connected secondaries, floating ground and independent feedback antennae (his words not mine):
It goes without saying that you should not attempt to make this unless you are knowledgeable of and comfortable with high-voltage electrical circuits.
Whats the difference?
6 voices, plenty to fiddle with
Its probably not what you think
In collab with Future Sound Systems