This was not a thing on top of my list, but I got curious of the Karplus-Strong implementation in the Teensy Audio Library, and took 30 minutes of my lunch break to put it in my strummer. The Teensy Audio Library requires at least a Teensy 3.2 to work, but I had found a Teensy 3.2 lying around that I had almost forgotten. It even had an audio output jack set up already. With some help from Paul Stoffregen's Touch Guitar code, I had the Teensy 3.2 programmed and working in no time, and the result was not bad at all. Very autoharp sounding :)

I have added the new code to the Github repo.

And a litte video snippet for you...