I heard about this a while ago. A way to “augment” one’s bass clarinet. Though the original looked like it would completely wreck one’s bass clarinet.
I mean, look at all the stuff bolted on it. No way. Plus those demos? I dunno about that contemporary music stuff…..very strange.
Now though, they have the sensor down to a little box that straps on your clarinet or saxophone. Gives you all sorts of possibilities. No idea how much it costs.