Question

can you think of any musical instruments that exist where a human is not needed for its sound activation? describe it.

Answer 1

I would say the theremin. It is a musical instrument where human touch is not needed. you can play it without touching it. you can move your hands around it (without touching it) to change the pitch. It generates electromagnetic fields around two antennae. It almost looks like a radio on a stand, with an atenna attached to the right side.