OK, so the performer wasn't all he should be, but it's the only vid I knew of with a good claviola example in it. There are a few other vids out there but the claviola is kind of in the background. I found the instrument to be kind of cool, doing different amounts of pitchbend on chord clusters; it's using pipes, not reeds, things like that. OR maybe everybody else here already knew all about the claviola so it took second place to opining about he who played it.