meyda
Version:
Real-time feature extraction for the web audio api
15 lines (14 loc) • 442 B
JavaScript
export default function (_a) {
var ampSpectrum = _a.ampSpectrum;
if (typeof ampSpectrum !== "object") {
throw new TypeError();
}
var numerator = 0;
var denominator = 0;
for (var i = 0; i < ampSpectrum.length; i++) {
numerator += Math.log(ampSpectrum[i]);
denominator += ampSpectrum[i];
}
return ((Math.exp(numerator / ampSpectrum.length) * ampSpectrum.length) /
denominator);
}