This sounds like a joke, but it’s not. A while ago, when the Web was young, this guy built a hamster-controlled MIDI cage. Notes would be set off by the hamster movements, where they went, and what they did. He released a couple of particularly good sample results online; I still have one. It’s called HAMSTERS! and it’s by HAMSTERS!

This is kind of the same thing, only with tree rings and an optical scanning turntable, controlling a MIDI piano. And it’s kind of awesome:

Turning Tree Rings Into Music

Of course, the human is making lots of artistic judgements about what kinds of things can happen, when building the device. That was true for the hamster music as well. But even with those caveats, I still think of the result as Entmusic.

I’m pretty sure they wouldn’t agree

Still looking for house concert venues! Know any?