I'm looking to pickup the frequency of a piano playing notes in a certain order (to eventually unlock something), but I'm having trouble figuring out how to read the frequencies. I bought a Make-It sensor kit from radioshack that has a microphone sensor. I've plugged in the appropriate A0, 5V, and Ground pins, on my R3 Plus, and now I'm trying to process the inputs. I've read to use FFT, but I can't seem to get it to work. After searching the internet for a few hours I'm at the end of my rope. Is there a simple tutorial anyone knows of to get the frequency input of a setup like this.
The FFT examples both fail on upload, and I've also tried messing with FreqCounter and FreqMeasurement and can't get anything simple working.
ANY help would be VERY much appreciated.