set(seconds, decayRate, reverse) {
    var rebuild = false;
    if (seconds) {
      this._seconds = seconds;
      rebuild = true;
    }
    if (decayRate) {
      this._decay = decayRate;
    }
    if (reverse) {
      this._reverse = reverse;
    }
    if (rebuild) {
      this._buildImpulse();
    }
  }
Set the reverb settings. Similar to .process(), but without
 assigning a new input.

 @method  set
 @for p5.Reverb
 @param  {Number} [seconds] Duration of the reverb, in seconds.
                          Min: 0, Max: 10. Defaults to 3.
 @param  {Number} [decayRate] Percentage of decay with each echo.
                           Min: 0, Max: 100. Defaults to 2.
 @param  {Boolean} [reverse] Play the reverb backwards or forwards.