message: don't convert if value is overridden
diff: @@ -134,7 +134,7 @@ define(["Tone/core/Tone", "Tone/type/Type", "Tone/core/AudioNode", "Tone/core/Ti
  * @return {number} the number which the value should be set to
  */
  Tone.Param.prototype._fromUnits = function(val){
  - if (this.convert || Tone.isUndef(this.convert)){
  + if ((this.convert || Tone.isUndef(this.convert)) && !this.overridden){
  switch (this.units){
  case Tone.Type.Time:
  return this.toSeconds(val);
  