message: making field as private
  [skip ci]
diff: @@ -55,7 +55,8 @@ define(["../core/Tone", "../effect/MidSideEffect", "../signal/Signal",
  /**
  * 1 - width
  - * @type {Tone}
  + * @type {Tone.Subtract}
  + * @private
  */
  this._oneMinusWidth = new Tone.Subtract();
  this._oneMinusWidth.connect(this._twoTimesWidthMid);
  