Drums!
I've made the Striso a modal device. Now if you hold it so the buttons are facing you (the y-axis is now up & down) it will behave like a drum when you tap it's side. If you tap toward the middle you'll get a lower drum tone than if you tap toward the top or bottom.
The drum sound has some static on the attack, I haven't been able to debug. Anyone who can gets my deep gratitude.