message: setting initial frequency
  just for the visual effect in tonejs-ui
diff: @@ -55,6 +55,7 @@ define(["../core/Tone", "../component/AmplitudeEnvelope", "../component/Frequenc
  * @type {Tone.Filter}
  */
  this.filter = new Tone.Filter(options.filter);
  + this.filter.frequency.value = 5000;
  /**
  * The filter envelope.
  