I'd actually argue it has some wicked problem characteristics. The input space is enormous (all possible audio), perception is subjective and nonlinear, and there's no objective function to optimize against, only "does this feel right?". Every solution you try reframes what "good" means. It's not as hard as social planning but is way harder than it sounds, no pun intended.

Ever seen https://www.youtube.com/watch?v=oNyXYPhnUIs ? There are a lot of things people might think feels right.

(Note both the scanner in front of KITT and the visual FX on his dashboard when he speaks, which changes from season to season.)

fta: The biggest unsolved problem is making it work well on all kinds of music.

The wickedness comes from wanting something that works just as well for John Summit as the Grateful Dead as Mozart and Bad Bunny.

But it seems like you could cheat for installations where the type of music is known and go from there. The other cheat is to have a "tap" button, and to pull that data and go from there.

mental note: the thought "it can't be that hard" when obviously it is sent me down a rabbit hole for a couple of hours