Another one that fits that description would be Martin Molin of Wintergatan, who's currently on a multi-year quest to build a concert-suitable programmable marble music instrument. He's been detailing the build and concept process on YouTube.
I thought this was going to be an instrument made entirely out of marble, and wondered what it could be. I thought maybe a cymbal but settled on it being most likely a flute or recorder of some sort. Which certainly seems like it could be made from marble, but I don't know enough about sculpture to know how plausible that is.
Turns out it's played with marbles instead, which is just as cool.
Inspired, I presume, by those awesome ray-traced animations from the early oughts? I had started sketching ideas on how to make that a reality (pneumatics and magnets mainly) but never got beyond concept.
