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Млин, жмем во Флеше F1 и читаем, там все написано ...

Sound.attachSound
Sound.duration
Sound.getBytesLoaded
Sound.getBytesTotal
Sound.getPan
Sound.getTransform
Sound.getVolume
Sound.loadSound
Sound.onLoad
Sound.onSoundComplete
Sound.position
Sound.setPan
Sound.setTransform
Sound.setVolume
Sound.start
Sound.stop