[yata69420]

There's quite a few actually. The term is "live coding".

Supercollider sounds like what you're after. You can even use vim :)

https://github.com/pjagielski/awesome-live-coding-music here's a list of related stuff

[dewert]

Saw a good talk at PyCon a couple of years ago about FoxDot, which is a wrapper around SuperCollider. Bit foggy on the details now, but it seemed like a good place to start.