Object3D →

Audio

Create a non-positional (global) audio object.

This uses the Web Audio API.

Code Example


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

    // create a global 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();
    });

Examples

webaudio / sandbox
webaudio / visualizer

Constructor

Audio(listener : AudioListener)

listener — (required) AudioListener instance.

Properties

# .autoplay : Boolean

Whether to start playback automatically. Default is false.

# .context : AudioContext

The AudioContext of the listener given in the constructor.

# .detune : Integer

Modify pitch, measured in cents. +/- 100 is a semitone. +/- 1200 is an octave. Default is 0.

# .filters : Array

Represents an array of AudioNodes. Can be used to apply a variety of low-order filters to create more complex sound effects. In most cases, the array contains instances of BiquadFilterNodes. Filters are set via Audio.setFilter or Audio.setFilters.

# .gain : GainNode

A GainNode created using AudioContext.createGain().

# .hasPlaybackControl : Boolean

Whether playback can be controlled using the play(), pause() etc. methods. Default is true.

# .isPlaying : Boolean

Whether the audio is currently playing.

# .listener : AudioListener

A reference to the listener object of this audio.

# .playbackRate : Float

Speed of playback. Default is 1.

# .offset : Float

An offset to the time within the audio buffer that playback should begin. Same as the offset parameter of AudioBufferSourceNode.start(). Default is 0.

# .duration : Float

Overrides the duration of the audio. Same as the duration parameter of AudioBufferSourceNode.start(). Default is undefined to play the whole buffer.

# .source : String

An AudioBufferSourceNode created using AudioContext.createBufferSource().

# .sourceType : String

Type of the audio source. Default is string 'empty'.

# .type : String

String denoting the type, set to 'Audio'.

Methods

# .connect() → this

Connect to the Audio.source. This is used internally on initialisation and when setting / removing filters.

# .disconnect() → this

Disconnect from the Audio.source. This is used internally when setting / removing filters.

# .getDetune() → Float

Returns the detuning of oscillation in cents.

# .getFilter() → BiquadFilterNode

Returns the first element of the filters array.

# .getFilters() → Array

Returns the filters array.

# .getLoop() → Boolean

Return the value of source.loop (whether playback should loop).

# .getOutput() → GainNode

Return the gainNode.

# .getPlaybackRate() → Float

Return the value of playbackRate.

# .getVolume(value) → Float

Return the current volume.

# .play(delay) → this

If hasPlaybackControl is true, starts playback.

# .pause() → this

If hasPlaybackControl is true, pauses playback.

# .onEnded()

Called automatically when playback finished.

# .setBuffer(audioBuffer) → this

Setup the source to the audioBuffer, and sets sourceType to 'buffer'.
If autoplay, also starts playback.

# .setDetune(value : Float) → this

Defines the detuning of oscillation in cents.

# .setFilter(filter) → this

Applies a single filter node to the audio.

# .setFilters(value : Array) → this

value - arrays of filters.
Applies an array of filter nodes to the audio.

# .setLoop(value : Boolean) → this

Set source.loop to value (whether playback should loop).

# .setLoopStart(value : Float) → this

Set source.loopStart to value.

# .setLoopEnd(value : Float) → this

Set source.loopEnd to value.

# .setMediaElementSource(mediaElement) → this

Applies the given object of type HTMLMediaElement as the source of this audio.
Also sets hasPlaybackControl to false.

# .setMediaStreamSource(mediaStream) → this

Applies the given object of type MediaStream as the source of this audio.
Also sets hasPlaybackControl to false.

# .setNodeSource(audioNode) → this

Setup the source to the audioBuffer, and sets sourceType to 'audioNode'.
Also sets hasPlaybackControl to false.

# .setPlaybackRate(value : Float) → this

If hasPlaybackControl is enabled, set the playbackRate to value.

# .setVolume(value : Float) → this

Set the volume.

# .stop() → this

If hasPlaybackControl is enabled, stops playback.

Puzzles

Verge3D offers audio puzzles to simplify work with sounds and music.

Source

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