pitchfinder.js

A compilation of pitch detection algorithms for Javascript. Throw out your old FFTs and zero-crossings, and make way for YIN, McLeod Pitch Method, Dynamic Wavelet, and more! Used in my app Tunesmith.

How to use

Include pitchfinder.js in your project.
Call its generator functions to return pitch detector functions.
Pass config objects to set properties of the function you want, including sample rate, buffer size, and more.
Call your functions with Float32Arrays as inputs - NOT audioBuffer objects (support for that coming soon). Conversion from audioBuffer to Float32Array is relatively trivial, like this: floatArray = buffer.getChannelData(0)
Extract the pitch from the returned object's 'freq' key. Some methods provide other info, such as probability.
???
Profit!
Send me your app to check out!

Code examples

Making a pitch detector with default settings:

var YINDetector = PITCHFINDER.YIN();
var estimate = YINDetector(float32Array);
console.log(estimate.freq);

Making a pitch detector with custom settings:

var McLeod = PITCHFINDER.MPM({
  samplerate: 48000,
  bufferSize: 3456,
  etc, etc.
})

(full list of parameters coming soon)

Thanks

These algorithms were ported from Jonas Six's excellent TarsosDSP library (written in Java). If you're looking for a far deeper set of tools than this, check out his work.

gristow / pitchfinder.js