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Audio frequency being buttons on a controller

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Im building a guitar that has a body of an NES. This isn’t exactly common, but it’s been done before by modders. The thing is, I want to make a guitar with an NES body that WORKS and you can plug it into a TV, and it’d be using a rasberry pi for the computing, none of the original electronics would be involved in this build. I can do all that, but something I don’t know how to do is make a sensor that senses the frequency of the strings, and depending on the note you play it converts it into a signal that the rasberry pi interprets as a controller button, allowing you to “play” the game by jamming on guitar. Any idea for either the hardware, software, or both? This is gonna be a fun project even if I can’t do it, though I’m sure I can since I’ve seen a video on YouTube of a guy controlling a drone through whistling.

A list of parts would also help SO MUCH since I’m new to this

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This sounds like a job for “FFT.”

In reply to Audio frequency being buttons on a controller

Start at https://makersportal.com/blog/2018/9/13/audio-processing-in-python-part-i-sampling-and-the-fast-fourier-transform

And in part three you see the guitar.

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