message: only testing when equal power panning is supported
diff: define(["Tone/component/Panner", "helper/Basic", "helper/Offline", "Test", "Tone/signal/Signal",
  - "helper/PassAudio", "helper/PassAudioStereo", "Tone/component/Merge", "Tone/core/Tone", "Tone/core/AudioNode"],
  -function (Panner, Basic, Offline, Test, Signal, PassAudio, PassAudioStereo, Merge, Tone, AudioNode) {
  + "helper/PassAudio", "helper/PassAudioStereo", "Tone/component/Merge",
  + "Tone/core/Tone", "Tone/core/AudioNode", "helper/Supports"],
  +function (Panner, Basic, Offline, Test, Signal, PassAudio, PassAudioStereo, Merge, Tone, AudioNode, Supports) {
  describe("Panner", function(){
  @@ -60,6 +61,7 @@ function (Panner, Basic, Offline, Test, Signal, PassAudio, PassAudioStereo, Merg
  });
  });
  + if (Supports.EQUAL_POWER_PANNER){
  it("mixes the signal in equal power when panned center", function(){
  return Offline(function(){
  var panner = new Panner(0).toMaster();
  @@ -71,6 +73,7 @@ function (Panner, Basic, Offline, Test, Signal, PassAudio, PassAudioStereo, Merg
  });
  });
  });
  + }
  });
  });
  });
  