I grew up playing about 15 instruments and the way that I was able to accomplish that was by cutting my classes, hanging out in the band room all day, and going from one instrument to the next to the next, until I learned how to play everything by ear.
But to do this kind of work, you have to be very strong, otherwise you lose your personality, your identity.
If you had a face like mine, you'd punch me right on the nose, and I'm just the fella to do it.

