For Clojure fans, there is [Overtone](https://overtone.github.io/), which uses the SuperCollider audio engine, but allows you to write more functional code and utilize REPL based development (within emacs!).
Tidal is another interesting project in that vein (though without the visual part): https://tidalcycles.org
The range of practical tasks for which this kind of tool would be my first choice is very narrow, but even if you have no clue what you'd do with it, it can be worth checking out for an afternoon just to experience a neat little declarative language that happens to go "beep boop [beep boop]" (yes, that is a snippet of valid code) as a side effect.
The documentation makes installation/setup quick and easy enough that it's worthwhile even if you have no other use for SuperCollider and just do it for the language tourism, using the included default sound bank. For example you could try code-golfing a rumba clave.
For someone like me, who doesn't have much time to context switch when playing around with making music, sticking with Clojure, which I've settled on as my language of choice, is a no brainer.
I enjoyed playing with overtone very much a few years ago. Haven't been at it in while.
Are there any new learning resources or pieces of the ecosystem I should know about?