Arduino Synthesizer Project - 001

Started working on the project by receiving this old style electrical piano and immediately took it apart to see what makes it hum. I noticed that the the PCB for the keys is pretty interesting it consists of 7 groups of 8 keys that are all interlinked in parallel, with a common positive maybe common. This is just the first step, I think ill proceed to working on the key matrix on paper and go on to create a schematic on Eagle so it is easier to conceptualize and figure out.