[name]

Create a AudioAnalyser object, which uses an [link:https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode AnalyserNode] to analyse audio data.

This uses the [link:https://developer.mozilla.org/en-US/docs/Web/API/Web_Audio_API Web Audio API].

Example

[example:webaudio_sandbox webaudio / sandbox]
[example:webaudio_visualizer webaudio / visualizer]

// create an AudioListener and add it to the camera var listener = new v3d.AudioListener(); camera.add(listener); // create an Audio source var sound = new v3d.Audio(listener); // load a sound and set it as the Audio object's buffer var audioLoader = new v3d.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 var analyser = new v3d.AudioAnalyser(sound, 32); // get the average frequency of the sound var data = analyser.getAverageFrequency();

Constructor

[name](audio, [link:https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode/fftSize fftSize])

Create a new [page:AudioAnalyser AudioAnalyser].

Properties

[property:AnalyserNode analyser]

An [link:https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode AnalyserNode] used to analyze audio.

[property:Integer fftSize]

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.

[property:Uint8Array data]

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.

Methods

[method:Uint8Array getFrequencyData]()

Uses the Web Audio's [link:https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode/getByteFrequencyData getByteFrequencyData] method. See that page.

[method:Number getAverageFrequency]()

Get the average of the frequencies returned by the [page:AudioAnalyser.getFrequencyData getFrequencyData] method.

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