Currently in the midst of soldering my piezo pressure sensors together and attaching a ts connector on the end to go into my audio interface. I figured I could make my setup a lot simpler by not using an Arduino at all.
So instead now I have the audio signal from my piezo’s going into a track into Ableton, where I am using a Max for Live patch that is converting audio over a set level to a midi note. This midi note is then being received on a midi track where it is responsible for a certain instrument. This saves me using an Arduino board and 3 sets of softwares running simultaneously.
I currently have a piezo that is mapped to scene changing within Ableton where each scene has a different key and scale for all the instruments.
Possibly looking into this plugin as well which looks like it might come in handy
Zollo Sound 
Very nice! Like the idea of attaching ts connectors to the piezo discs themselves. Definitely makes them easier to work with
LikeLike