Since the 1970s I've worked as a session musician and freelance producer doing stuff for various labels and the BBC, but like Bob said in his OP it's not a reliable or regular income, so to pay the bills I'm a forensic mathematician, also working in operational research, system efficiency and forecasting.

These days I'm trying to retire and just spend a couple of days a week teaching music, but I keep getting dragged back to work from time to time. At least it pays for us to go travelling which is something we love, though it also keeps me away from the forum sometimes, which is something I miss.

ROG.