message: Param.value cancels scheduled values
  uses context.currentTime for instant change
diff: @@ -83,7 +83,8 @@ define(["Tone/core/Tone", "Tone/type/Type", "Tone/core/AudioNode", "Tone/core/Ti
  },
  set : function(value){
  this._initialValue = this._fromUnits(value);
  - this.setValueAtTime(value, this.now());
  + this.cancelScheduledValues(this.context.currentTime);
  + this.setValueAtTime(value, this.context.currentTime);
  }
  });
  