meyda/dist/esm/extractors/perceptualSharpness.js

Real-time feature extraction for the web audio api

import loudness from "./loudness";
export default function (_a) {
    var ampSpectrum = _a.ampSpectrum, barkScale = _a.barkScale;
    var loudnessValue = loudness({ ampSpectrum: ampSpectrum, barkScale: barkScale });
    var spec = loudnessValue.specific;
    var output = 0;
    for (var i = 0; i < spec.length; i++) {
        if (i < 15) {
            output += (i + 1) * spec[i + 1];
        }
        else {
            output += 0.066 * Math.exp(0.171 * (i + 1));
        }
    }
    output *= 0.11 / loudnessValue.total;
    return output;
}