message: player was undefined
diff: @@ -287,7 +287,8 @@ define(["helper/Basic", "Tone/source/Player", "helper/Offline",
  it("only seeks if player is started", function(){
  return Offline(function(){
  - player.seek(0.2, 0.01).toMaster();
  + var player = new Player(buffer).toMaster();
  + player.seek(0.2, 0.01);
  }, 0.05).then(function(buffer){
  expect(buffer.isSilent()).to.be.true;
  });
  