It’s either prior agreement, or quick communication.
Ever seen Back to the Future? “Ok, guys, this is a blues riff in B” is all the band needed to feel their way through Johnny B Goode. Musicians with fast hands and fast brains can really do that. 🙂
[Edit: Obviously, they’re not going to be 100% delighted with that first take, and if you give them some rehearsal time their performances will tighten up a lot!]
Latest Answers