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	<title>AudioAnalyser - Three.js Docs</title>
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	<h1 translate="no">AudioAnalyser</h1>
		<section>
			<header>
				<div class="class-description"><p>This class can be used to analyse audio data.</p></div>
				<h2>Code Example</h2>
				<div translate="no"><pre><code class="language-js">// 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></pre></div>
			</header>
			<article>
				<div class="container-overview">
					<h2>Constructor</h2>
					<h3 class="name name-method" id="AudioAnalyser" translate="no">new <a href="#AudioAnalyser">AudioAnalyser</a><span class="signature">( audio : <span class="param-type">Audio</span>, fftSize : <span class="param-type">number</span> )</span> </h3>
					<div class="method">
						<div class="description">
							<p>Constructs a new audio analyzer.</p>
						</div>
						<table class="params">
							<tbody>
								<tr>
									<td class="name"><code>audio</code></td>
									<td class="description last"><p>The audio to analyze.</p></td>
								</tr>
								<tr>
									<td class="name"><code>fftSize</code></td>
									<td class="description last"><p>The window size in samples that is used when performing a Fast Fourier Transform (FFT) to get frequency domain data.<br/>Default is <code>2048</code>.</p></td>
								</tr>
							</tbody>
						</table>
					</div>
				</div>
				<h2 class="subsection-title">Properties</h2>
				<div class="member">
					<h3 class="name" id="analyser" translate="no">.<a href="#analyser">analyser</a><span class="type-signature"> : AnalyserNode</span> </h3>
					<div class="description">
						<p>The global audio listener.</p>
					</div>
				</div>
				<div class="member">
					<h3 class="name" id="data" translate="no">.<a href="#data">data</a><span class="type-signature"> : Uint8Array</span> </h3>
					<div class="description">
						<p>Holds the analyzed data.</p>
					</div>
				</div>
				<h2 class="subsection-title">Methods</h2>
					<h3 class="name name-method" id="getAverageFrequency" translate="no">.<a href="#getAverageFrequency">getAverageFrequency</a><span class="signature">()</span><span class="type-signature"> : number</span> </h3>
					<div class="method">
						<div class="description">
							<p>Returns the average of the frequencies returned by <a href="AudioAnalyser.html#getFrequencyData">AudioAnalyser#getFrequencyData</a>.</p>
						</div>
						<dl class="details">
							<dt class="tag-returns"><strong>Returns:</strong> The average frequency.</dt>
						</dl>
					</div>
					<h3 class="name name-method" id="getFrequencyData" translate="no">.<a href="#getFrequencyData">getFrequencyData</a><span class="signature">()</span><span class="type-signature"> : Uint8Array</span> </h3>
					<div class="method">
						<div class="description">
							<p>Returns an array with frequency data of the audio.</p>
<p>Each item in the array represents the decibel value for a specific frequency.
The frequencies are spread linearly from 0 to 1/2 of the sample rate.
For example, for 48000 sample rate, the last item of the array will represent
the decibel value for 24000 Hz.</p>
						</div>
						<dl class="details">
							<dt class="tag-returns"><strong>Returns:</strong> The frequency data.</dt>
						</dl>
					</div>
				<h2 class="subsection-title">Source</h2>
				<p>
					<a href="https://github.com/mrdoob/three.js/blob/master/src/audio/AudioAnalyser.js" target="_blank" rel="noopener" translate="no">src/audio/AudioAnalyser.js</a>
				</p>
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