message: decibels also ramps exponentially
diff: @@ -336,7 +336,7 @@ define(["Tone/core/Tone", "Tone/type/Type"], function(Tone){
  */
  Tone.Param.prototype.rampTo = function(value, rampTime, startTime){
  rampTime = this.defaultArg(rampTime, 0);
  - if (this.units === Tone.Type.Frequency || this.units === Tone.Type.BPM){
  + if (this.units === Tone.Type.Frequency || this.units === Tone.Type.BPM || this.units === Tone.Type.Decibels){
  this.exponentialRampToValue(value, rampTime, startTime);
  } else {
  this.linearRampToValue(value, rampTime, startTime);
  