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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.
StephanM
Hello, its basically a bandpass filter followed by a peak detector.
Definitely much room for improvement. After looking into it and getting an overview I wrote a summary here (including links to the code and a quick experiment to visualize):
http://forum.espruino.com/conversations/372681/?offset=50#16454552
Unfortunatly had to stop due to time issues, but plan to come back soon.