If your instrument does not exist yet you build it. Then you fuck around.
This is Moondog with his Trimba, which he built himself. Moondog is a blind homeless man on the streets of New York City. It is 1953 (I think) and he dresses like a viking because vikings are rad.
“I am essentially not an instrument builder, but a composer. I am a philosophic music man who long ago was seduced into musical carpentry. As a composer and a musical philosopher I make my living by selling records of my music. I am both the manufacturer and the retailer. And I distribute the records very largely by mail.” — Harry Partch, 1958