@thi.ng/dsp/integrator.js

Composable signal generators, oscillators, filters, FFT, spectrum, windowing & related DSP utils

import { AProc } from "./aproc.js";
const integrator = (coeff, start) => new Integrator(coeff, start);
class Integrator extends AProc {
  constructor(_coeff = 1, _start = 0) {
    super(_start);
    this._coeff = _coeff;
    this._start = _start;
  }
  copy() {
    return new Integrator(this._coeff, this._start);
  }
  reset() {
    this._val = this._start;
    return this;
  }
  next(x) {
    return this._val = this._val * this._coeff + x;
  }
  coeff() {
    return this._coeff;
  }
  setCoeff(c) {
    this._coeff = c;
  }
}
export {
  Integrator,
  integrator
};