The original Doctor Who theme tune was built up from oscillator outputs using tape and a razor blade. Once the four-track tape recorder came along, bands such as the Beatles started building tracks like a layer cake. Dr Moog started the death march of the physical instrument: synths make good musician sound excellent and beginners sound passable. Then there's that wretched AutoTune, which to me sounds like someone's made a smoothie out of a Dalek.

Deep-fake music is just another tool in the box. What I'm waiting for is the copyright scraps: at least with sampling, the original is obvious, and what is a deep fake but sampling on steroids? The ultimate test is whether whatever you do, however you do it, sounds any good in two years' time. Oh, and whether you can repeat it live on stage, which is where we came in: tribute bands are today's homage to yesterday's greats.