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chromaprint-fixed

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A JavaScript implementation of AcoustID Chromaprint

github.com/bjjb/chromaprint.js

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{ expect } = @chai or require('chai') { chroma } = @chromaprint or require('../lib/chroma').chromaprint describe "calculating chroma features", -> it "properly calculates A", -> fn = chroma(10, 510, 256, 1000) expect(fn(113: 1)).to.eql [1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0] it "properly calculates G♯", -> fn = chroma(10, 510, 256, 1000) expect(fn(112: 1)).to.eql [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1] it "properly calculates B", -> fn = chroma(10, 510, 256, 1000) expect(fn(64: 1)).to.eql [0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0] it "properly calculates an interpolated B", -> fn = chroma(10, 510, 256, 1000, true) results = fn(64: 1) expect(results[0]).to.eq 0 expect(Number(results[1].toPrecision(6))).to.eq 0.286905 expect(Number(results[2].toPrecision(6))).to.eq 0.713095 expect(results[3..]).to.eql [0, 0, 0, 0, 0, 0, 0, 0, 0] it "properly calculates an interpolated A", -> fn = chroma(10, 510, 256, 1000, true) results = fn(113: 1) expect(Number(results[0].toPrecision(6))).to.eq 0.555242 expect(results[1..-2]).to.eql [0, 0, 0, 0, 0, 0, 0, 0, 0, 0] expect(Number(results[11].toPrecision(6))).to.eq 0.444758 it "properly calculates an interpolated G♯", -> fn = chroma(10, 510, 256, 1000, true) results = fn(112: 1) expect(results[1..-2]).to.eql [0, 0, 0, 0, 0, 0, 0, 0, 0, 0] expect(Number(results[11].toPrecision(6))).to.eq 0.598646