I would like to hook up several piezos to an arduino so that, when they are activated each piezo plays/triggers a separate tone. For instance, I'll have five piezos connected to the arduino - when I apply pressure to each one they play a separate note, either through a software interface on a computer or from the piezos themselves. Basically an Arduino synth using piezos as keys.
I'm just not quite sure how to go about doing this. I'm sure its possible but just need a push in the right direction. Any ideas? Thanks!
The practical difficulty of using one device as both an input sensor and output device, is that once activated to output (a sound) you would have to disable using it as input for some fixed time. Something more responsive would be to use separate sensors for the keys, and just one speaker for all sounds. The good folks who came up the Arduino tutorials have a 3 key sensor player example here: http://arduino.cc/en/Tutorial/Tone3
and another example of using a piezo as a sound sensor here: http://www.arduino.cc/en/Tutorial/KnockSensor