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- <!DOCTYPE html>
- <html lang="zh">
- <head>
- <meta charset="utf-8" />
- <base href="../../../" />
- <script src="page.js"></script>
- <link type="text/css" rel="stylesheet" href="page.css" />
- </head>
- <body>
- <h1>[name]</h1>
- <p class="desc">
- 创建AudioAnalyser对象, 使用[link:https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode AnalyserNode]
- 去分析音频数据.<br /><br />
- 使用了 [link:https://developer.mozilla.org/en-US/docs/Web/API/Web_Audio_API Web Audio API].
- </p>
- <h2>代码示例</h2>
- <code>
- // create an AudioListener and add it to the camera
- const listener = new THREE.AudioListener();
- camera.add( listener );
- // create an Audio source
- const sound = new THREE.Audio( listener );
- // load a sound and set it as the Audio object's buffer
- const audioLoader = new THREE.AudioLoader();
- audioLoader.load( 'sounds/ambient.ogg', function( buffer ) {
- sound.setBuffer( buffer );
- sound.setLoop(true);
- sound.setVolume(0.5);
- sound.play();
- });
- // create an AudioAnalyser, passing in the sound and desired fftSize
- const analyser = new THREE.AudioAnalyser( sound, 32 );
- // get the average frequency of the sound
- const data = analyser.getAverageFrequency();
- </code>
- <h2>例子</h2>
- <p>
- [example:webaudio_sandbox webaudio / sandbox ]<br />
- [example:webaudio_visualizer webaudio / visualizer ]
- </p>
- <h2>构造函数</h2>
- <h3>[name]( audio, [link:https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode/fftSize fftSize] )</h3>
- <p>
- 创建[page:AudioAnalyser AudioAnalyser].
- </p>
- <h2>属性</h2>
- <h3>[property:AnalyserNode analyser]</h3>
- <p>[link:https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode AnalyserNode]用来分析音频数据.</p>
- <h3>[property:Integer fftSize]</h3>
- <p>
- 2的幂次方最高为2048, 用来表示确定频域的FFT (傅立叶变换)大小.
- 这个[link:https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode/fftSize page]有详细信息.
- </p>
- <h3>[property:Uint8Array data]</h3>
- <p>
- 用来分析数据的Uint8Array的大小由[link:https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode/frequencyBinCount analyser.frequencyBinCount]
- 确定.
- </p>
- <h2>方法</h2>
- <h3>[method:Uint8Array getFrequencyData]()</h3>
- <p>
- 使用网络音频的[link:https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode/getByteFrequencyData getByteFrequencyData] 方法.
- 看这个页面.
- </p>
- <h3>[method:Number getAverageFrequency]()</h3>
- <p>
- 通过方法[page:AudioAnalyser.getFrequencyData getFrequencyData]获取平均频率.
- </p>
- <h2>源码</h2>
- <p>
- [link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]
- </p>
- </body>
- </html>
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