AudioAnalyser

Create a AudioAnalyser object, which uses an AnalyserNode to analyse audio data.

Code Example


    // create an AudioListener and add it to the camera
    const listener = new v3d.AudioListener();
    camera.add(listener);

    // create an Audio source
    const sound = new v3d.Audio(listener);

    // load a sound and set it as the Audio object's buffer
    const 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
    const analyser = new v3d.AudioAnalyser(sound, 32);

    // get the average frequency of the sound
    const data = analyser.getAverageFrequency();

Constructor

AudioAnalyser(audio : Audio, fftSize : Integer)

Create a new AudioAnalyser.

Properties

# .analyser : AnalyserNode

An AnalyserNode used to analyze audio.

# .fftSize : Integer

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 this page for details.

# .data : Uint8Array

A Uint8Array with size determined by analyser.frequencyBinCount used to hold analysis data.

Methods

# .getFrequencyData() → Uint8Array

Uses the Web Audio's getByteFrequencyData method.

# .getAverageFrequency() → Float

Get the average of the frequencies returned by the getFrequencyData method.

Source

For more info on how to obtain the source code of this module see this page.