I did software testing for sound systems / IoT and their associated software. It was a fun mix of scripting, test planning, data. As a musician it really scratched that itch and as a nerd doubly so. Only now after being forced out have I come to realize I was riding a unicorn.
Played cello professionally for a while until I realized nobody has a career in classical music without family money or a benefactor and I had neither. Good times and good lessons: I played with a metal band for a while and it rocked my world.