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Oct 5, 2012
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Nov 8, 2016

Simple pitch detection

I whipped this app up to start experimenting with pitch detection, and also to test live audio input. It used to perform a naive (zero-crossing based) pitch detection algorithm; now it uses a naively-implemented auto-correlation algorithm in realtime, so it should work well with most monophonic waveforms (although strong harmonics will throw it off a bit). It works well with whistling (which has a clear, simple waveform); it also works pretty well to tune my guitar.

Live instance hosted on https://webaudiodemos.appspot.com/pitchdetect/.

Check it out, feel free to fork, submit pull requests, etc. MIT-Licensed - party on.

-Chris

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Pitch detection in Web Audio using autocorrelation

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