Cool stuff.... a drummer buddy of mine used to do that with beer glasses. Nothing quite so fancy and he only used one glass.... and the pitch changed as he drank.... that sound was quite annoying after a minute or so....


You can find my music at:
www.herbhartley.com
Add nothing that adds nothing to the music.
You can make excuses or you can make progress but not both.

The magic you are looking for is in the work you are avoiding.