YouTube is dangerous -- it's possible to spend an evening watching
Automated Musical Instruments play!  But there are other sounds out
there, I think you'd agree.  Many of them are automatable and many
demonstrate their mechanical music origins.

Some are just weird but one man's collection of trash is another
man's violin!  What's interesting is how many of them demonstrate
principles used in mechanical instruments:

  https://www.youtube.com/watch?v=7sjvA4mOqE4
 
  Top 10 New Musical Instrument Inventions

Tom Detweiler,
Grass Valley, California