message: effect is no longer a feedback effect.
  fixes
diff: -define(["Tone/core/Tone", "Tone/component/LFO", "Tone/effect/StereoXFeedbackEffect", "Tone/core/Delay"], function(Tone){
  +define(["Tone/core/Tone", "Tone/component/LFO", "Tone/effect/StereoEffect", "Tone/core/Delay"], function(Tone){
  "use strict";
  /**
  - * @class Tone.Chorus is a stereo chorus effect with feedback composed of
  + * @class Tone.Chorus is a stereo chorus effect composed of
  * a left and right delay with a Tone.LFO applied to the delayTime of each channel.
  * Inspiration from [Tuna.js](https://github.com/Dinahmoe/tuna/blob/master/tuna.js).
  * Read more on the chorus effect on [SoundOnSound](http://www.soundonsound.com/sos/jun04/articles/synthsecrets.htm).
  *
  * @constructor
  - * @extends {Tone.StereoXFeedbackEffect}
  + * @extends {Tone.StereoEffect}
  * @param {Frequency|Object} [frequency] The frequency of the LFO.
  * @param {Milliseconds} [delayTime] The delay of the chorus effect in ms.
  * @param {NormalRange} [depth] The depth of the chorus.
  @@ -21,7 +21,7 @@ define(["Tone/core/Tone", "Tone/component/LFO", "Tone/effect/StereoXFeedbackEffe
  Tone.Chorus = function(){
  var options = Tone.defaults(arguments, ["frequency", "delayTime", "depth"], Tone.Chorus);
  - Tone.StereoXFeedbackEffect.call(this, options);
  + Tone.StereoEffect.call(this, options);
  /**
  * the depth of the chorus
  @@ -103,7 +103,7 @@ define(["Tone/core/Tone", "Tone/component/LFO", "Tone/effect/StereoXFeedbackEffe
  this.spread = options.spread;
  };
  - Tone.extend(Tone.Chorus, Tone.StereoXFeedbackEffect);
  + Tone.extend(Tone.Chorus, Tone.StereoEffect);
  /**
  * @static
  @@ -113,7 +113,6 @@ define(["Tone/core/Tone", "Tone/component/LFO", "Tone/effect/StereoXFeedbackEffe
  "frequency" : 1.5,
  "delayTime" : 3.5,
  "depth" : 0.7,
  - "feedback" : 0.1,
  "type" : "sine",
  "spread" : 180
  };
  @@ -195,7 +194,7 @@ define(["Tone/core/Tone", "Tone/component/LFO", "Tone/effect/StereoXFeedbackEffe
  * @returns {Tone.Chorus} this
  */
  Tone.Chorus.prototype.dispose = function(){
  - Tone.StereoXFeedbackEffect.prototype.dispose.call(this);
  + Tone.StereoEffect.prototype.dispose.call(this);
  this._lfoL.dispose();
  this._lfoL = null;
  this._lfoR.dispose();
  