message: get the _param's value if available
diff: @@ -71,6 +71,14 @@ define(["Tone/core/Tone", "Tone/signal/WaveShaper", "Tone/type/Type", "Tone/core
  */
  Tone.Signal.prototype.connect = Tone.SignalBase.prototype.connect;
  + Tone.Signal.prototype.getValueAtTime = function(time){
  + if (this._param.getValueAtTime){
  + return this._param.getValueAtTime(time);
  + } else {
  + return Tone.Param.prototype.getValueAtTime.call(this, time);
  + }
  + };
  +
  /**
  * dispose and disconnect
  * @returns {Tone.Signal} this
  