Hello! Thanks so much for the info so far, I'm a real big newbie to this right now. Modding a toy keyboard. but the pitch is off, need a way to adjust it. I have a pot, (1k), and I found the pitch resistor (large pitch swing when touched with licked finger). Confused about the 'pitch base' though, I see my brain, a small circular black blob, but if I touch a wire from the pitch resistor on any of the leads around it i can't seem to get any action. I feel as If i'm missing something basic. Any assistance would be greatly appreciated!!