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- <head>
- <meta charset="utf-8" />
- <base href="../../../" />
- <script src="page.js"></script>
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- </head>
- <body>
- <h1>[name]</h1>
- <p class="desc">
- Create a AudioAnalyser object, which uses an
- [link:https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode AnalyserNode] to analyse audio data.<br /><br />
- This uses the
- [link:https://developer.mozilla.org/en-US/docs/Web/API/Web_Audio_API Web Audio API].
- </p>
- <h2>Code Example</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>Examples</h2>
- <p>
- [example:webaudio_sandbox webaudio / sandbox ]<br />
- [example:webaudio_visualizer webaudio / visualizer ]
- </p>
- <h2>Constructor</h2>
- <h3>[name]( audio, [link:https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode/fftSize fftSize] )</h3>
- <p>Create a new [page:AudioAnalyser AudioAnalyser].</p>
- <h2>Properties</h2>
- <h3>[property:AnalyserNode analyser]</h3>
- <p>
- An [link:https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode AnalyserNode] used to analyze audio.
- </p>
- <h3>[property:Integer fftSize]</h3>
- <p>
- A non-zero power of two up to 2048, representing the size of the FFT (Fast
- Fourier Transform) to be used to determine the frequency domain. See
- [link:https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode/fftSize this page] for details.
- </p>
- <h3>[property:Uint8Array data]</h3>
- <p>
- A Uint8Array with size determined by
- [link:https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode/frequencyBinCount analyser.frequencyBinCount] used to hold analysis data.
- </p>
- <h2>Methods</h2>
- <h3>[method:Uint8Array getFrequencyData]()</h3>
- <p>
- Uses the Web Audio's
- [link:https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode/getByteFrequencyData getByteFrequencyData] method. See that page.
- </p>
- <h3>[method:Number getAverageFrequency]()</h3>
- <p>
- Get the average of the frequencies returned by the
- [page:AudioAnalyser.getFrequencyData getFrequencyData] method.
- </p>
- <h2>Source</h2>
- <p>
- [link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]
- </p>
- </body>
- </html>
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