I had purchased a cheap Walmart piano to play around with my music creation and have some options other than bass/guitar. I have been learning oscillator circuits and made my own effect pedal, so when the main chip started acting like it got burned out, I wanted to use the key circuit board section with a 555 timer or similar circuit. I do not, however, know how the contacts are connected to produce the signal path when pressed, due to no available pinout of the main chip. How would I go about finding the paths so I can connect it to an oscillator circuit to produce at least a part of the keys' worth of signals?
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