Rate]()</h3>
		<p>
		返回[page:Audio.playbackRate playbackRate]的值.
		</p>

		<h3>[method:Float getVolume]()</h3>
		<p>
		返回音量.
		</p>

		<h3>[method:this play]( delay )</h3>
		<p>
		如果[page:Audio.hasPlaybackControl hasPlaybackControl]是true, 开始播放.
		</p>

		<h3>[method:this pause]()</h3>
		<p>
		如果[page:Audio.hasPlaybackControl hasPlaybackControl]是true, 暂停播放.
		</p>

		<h3>[method:undefined onEnded]()</h3>
		<p>
		播放完成后自动调用.
		</p>

		<h3>[method:th