gistfile1.txt

// after: public volume: number = 1.0;

    private _prev:number = 0;
    public static REVERB_LEN:number = 2000;
    private _reverb:Float64Array = new Float64Array(Synth.REVERB_LEN);
    private _reverb_ix = 0;


// after: sample *= this.volume;

	  var slew_limit = 0.005;
	  if (Math.abs(sample - this._prev) > slew_limit)
	    sample = this._prev + (sample > this._prev ? slew_limit : -slew_limit);
	  this._prev = sample;

	  var next = (this._reverb_ix + 1) % Synth.REVERB_LEN;
	  var other = (this._reverb_ix + 37) % Synth.REVERB_LEN;
	  sample += 0.4 * this._reverb[next] +
	    0.1 * this._reverb[other];
	  this._reverb[this._reverb_ix] = sample;
	  this._reverb_ix = next;