I'm also considering a project that would involve detecting drum hits,
I would put a 1k resistor in serial with a diode to an input pin. Also hang a rc network on the input pin to ground. The peizo will generate multiple pulses (likely thousands) each hit and you don't want to detect them as thousands of hit
I was thinking about that same thing today, and I was gonna try to 'debounce' it somehow in the software but I do like the idea of a hardware fix, would make my coding easier.
dhenry, i'd be interested to know if you've done this before.
dedokta, if you still have some schematics available then I'd love to look at them
jbiondi, did you get your project working in the year-and-a-bit since you started this thread?