javascript
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three.js
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		[page:Object3D] &rarr;

		<h1>[name]</h1>

		<p class="desc">
			创建一个（ 全局 ) audio对象.<br /><br />

			使用 [link:https://developer.mozilla.org/en-US/docs/Web/API/Web_Audio_API Web Audio API].
		</p>


		<h2>例子</h2>

		<p>
			[example:webaudio_sandbox webaudio / sandbox ]</br>
			[example:webaudio_visualizer webaudio / visualizer ]
		</p>

		<code>
		// create an AudioListener and add it to the camera
		var listener = new THREE.AudioListener();
		camera.add( listener );

		// create a global audio source
		var sound = new THREE.Audio( listener );

		// load a sound and set it as the Audio object's buffer
		var audioLoader = new THREE.AudioLoader();
		audioLoader.load( 'sounds/ambient.ogg', function( buffer ) {
			sound.setBuffer( buffer );
			sound.setLoop( true );
			sound.setVolume( 0.5 );
			sound.play();
		});
		</code>


		<h2>构造函数</h2>


		<h3>[name]( [param:AudioListener listener] )</h3>
		<p>
		listener — (必须) [page:AudioListener AudioListener] 的实例.
		</p>


		<h2>属性</h2>

		<h3>[property:Boolean autoplay]</h3>
		<p>是否自动开始播放. 默认为 *false*.</p>

		<h3>[property:AudioContext context]</h3>
		<p>构造函数中传入[page:AudioListener listener]的[link:https://developer.mozilla.org/en-US/docs/Web/API/AudioContext AudioContext].</p>

		<h3>[property:Array filters]</h3>
		<p>表示[link:https://developer.mozilla.org/en-US/docs/Web/API/BiquadFilterNode BiquadFilterNodes]的数组. 可以使用多种不同的低阶filters去创建复杂的音效. filters可以通过 [page:Audio.setFilter] 或者 [page:Audio.setFilters]设置.</p>

		<h3>[property:GainNode gain]</h3>
		<p>使用[link:https://developer.mozilla.org/en-US/docs/Web/API/AudioContext/createGain AudioContext.createGain]()创建的[link:https://developer.mozilla.org/en-US/docs/Web/API/GainNode GainNode].</p>

		<h3>[property:Boolean hasPlaybackControl]</h3>
		<p>是否可以使用 [page:Audio.play play](),
			[page:Audio.pause pause]()等方法控制播放. 默认为 *true*.</p>

		<h3>[property:Number playbackRate]</h3>
		<p>播放速率. 默认为 *1*.</p>

		<h3>[property:Boolean isPlaying]</h3>
		<p>是否正在播放</p>

		<h3>[property:AudioListener listener]</h3>
		<p>A reference to the listener object of this audio.</p>

		<h3>[property:Number startTime]</h3>
		<p>开始播放的时间. 和[link:https://developer.mozilla.org/en-US/docs/Web/API/AudioBufferSourceNode/start AudioBufferSourceNode.start]()的*when*参数一样. 默认为 *0*.</p>

		<h3>[property:Number offset]</h3>
		<p>音频开始播放的偏移时间. 和[link:https://developer.mozilla.org/en-US/docs/Web/API/AudioBufferSourceNode/start AudioBufferSourceNode.start]()的*offset*参数一样. 默认为 *0*.</p>

		<h3>[property:String source]</h3>
		<p>使用 [link:https://developer.mozilla.org/en-US/docs/Web/API/AudioContext/createBufferSource AudioContext.createBufferSource]()创建的[link:https://developer.mozilla.org/en-US/docs/Web/API/AudioBufferSourceNode AudioBufferSourceNode].</p>

		<h3>[property:String sourceType]</h3>
		<p>音源的类型. 默认为 'empty'.</p>

		<h3>[property:String type]</h3>
		<p>表示类型的字符串, 设置为'Audio'.</p>


		<h2>方法</h2>

		<h3>[method:Audio connect]()</h3>
		<p>
		连接[page:Audio.source]. 在初始化和设置/删除filters时使用.
		</p>

		<h3>[method:Audio disconnect]()</h3>
		<p>
		断开连接[page:Audio.source]. 在设置/删除filters时使用.
		</p>

		<h3>[method:BiquadFilterNode getFilter]()</h3>
		<p>
		返回 [page:Audio.filters filters] 数组的第一个元素.
		</p>

		<h3>[method:Array getFilters]()</h3>
		<p>
		返回[page:Audio.filters filters] 数组.
		</p>

		<h3>[method:Boolean getLoop]()</h3>
		<p>
		返回[link:https://developer.mozilla.org/en-US/docs/Web/API/AudioBufferSourceNode/loop source.loop]
		 (是否循环播放)的值.
		</p>

		<h3>[method:GainNode getOutput]()</h3>
		<p>
		返回[page:Audio.gain gainNode].
		</p>

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

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

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

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

		<h3>[method:null onEnded]()</h3>
		<p>
		播放完成后自动调用. 如果[page:Audio.isPlaying isPlaying]设置为false.
		</p>

		<h3>[method:Audio setBuffer]( audioBuffer )</h3>
		<p>
		设置[page:Audio.source source]给audioBuffer, 和设置[page:Audio.sourceType sourceType]给'buffer'.<br />
		如果[page:Audio.autoplay autoplay]为true, 也开始播放.
		</p>

		<h3>[method:Audio setFilter]( filter )</h3>
		<p>
		设置一个[link:https://developer.mozilla.org/en-US/docs/Web/API/BiquadFilterNode BiquadFilterNode]给Audio.
		</p>

		<h3>[method:Audio setFilters]( [param:Array value] )</h3>
		<p>
		value--filters数组.<br />
		应用[link:https://developer.mozilla.org/en-US/docs/Web/API/BiquadFilterNode BiquadFilterNodes]数组给Audio.
		</p>

		<h3>[method:Audio setLoop]( [param:Boolean value] )</h3>
		<p>
		设置[link:https://developer.mozilla.org/en-US/docs/Web/API/AudioBufferSourceNode/loop source.loop] 的值
		(是否循环播放).
		</p>

		<h3>[method:Audio setMediaElementSource]( mediaElement )</h3>
		<p>
		应用[link:https://developer.mozilla.org/en-US/docs/Web/API/HTMLMediaElement HTMLMediaElement]类型对象作为音源.<br />
		并且设置[page:Audio.hasPlaybackControl hasPlaybackControl]为false.

		</p>

		<h3>[method:Audio setNodeSource]( audioNode )</h3>
		<p>
		设置[page:Audio.source source]给audioBuffer, 和设置[page:Audio.sourceType sourceType]给 'audioNode'.<br />
		并且设置[page:Audio.hasPlaybackControl hasPlaybackControl]为false.

		</p>

		<h3>[method:Audio setPlaybackRate]( [param:Float value] )</h3>
		<p>
		如果[page:Audio.hasPlaybackControl hasPlaybackControl]是true, 设置[page:Audio.playbackRate playbackRate]（播放速率） 的值.
		</p>

		<h3>[method:Audio setVolume]( [param:Float value] )</h3>
		<p>
		设置音量.
		</p>

		<h3>[method:Audio stop]()</h3>
		<p>
		如果[page:Audio.hasPlaybackControl hasPlaybackControl]是true, 停止播放,
		重新设置[page:Audio.startTime startTime]为 *0* 和 设置 [page:Audio.isPlaying isPlaying]为false.
		</p>

		<h2>源码</h2>

		[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]
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