Nice!
It’s it’s clear I was very wrong about lyrics being a modern invention. Thanks for the discussion.
But seriously…
Weren’t those earliest classic Greek plays basically musicals, featuring a chorus providing musical interludes, dancing, etc.?
There are archeological finds of instruments (i.e. chimes, flutes) that pre-date writing by a couple thousand years, but that doesn’t actually answer your question.
~Max
I want to hear more about the chimp fire and rain dances.
Of course! 
I should have remembered that.