class Howl {
  Howl({List<String> src, bool autoPlay = false});

  void play();
  void pause();
  void stop();

  HowlState state(); //loading, loaded, undefined

  double seek([double seek]);
  void mute(bool mute);
  bool get playing;
  double volume([double volume]);
  double get duration;
  void on(String event, Function callback);
  void onLoad(Function(dynamic id) callback);
  void onPlay(Function(dynamic id) callback);
  void onPause(Function(dynamic id) callback);
  void onStop(Function(dynamic id) callback);
  void onEnd(Function(dynamic id) callback);
}