I'm getting more in line with the idea of making a "special" instrument with Bela for a summer project.
I know you can use piezos for percussion triggers and I'm wondering if the same thing would work under the bridge of a rubber-band type transducer - just for note triggering and amplitude rather than pitch tracking. I know piezos are used for guitar pickups and all that so it seems obvious it is possible, just wondering if anyone had done anything like that to work out the problems.