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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@Owen
Do you know any good FFT libraries in JavaScript?
Would it be worth looking into a hard solution for the audio analysing?
I'm very new to electronic but I found this chip which might help, MSGEQ7.
Or maybe an Arduino shield, https://www.sparkfun.com/products/10306