I couldn't think of any musical instruments whose sounds are based on torsional vibration, so I made one.
For more on Potwot and other instruments by Bart Hopkin, visit the Instrumentarium at BartHopkin.com.
And by the way! Bart has recently released an album of his music, made primarily on instruments he's made. It's called Audiorium, and it's available through the usual download and streaming services.
