main repo

node_modules/three/src/audio/Audio.js

@@ -0,0 +1,777 @@
+import { Object3D } from '../core/Object3D.js';
+
+/**
+ * Represents a non-positional ( global ) audio object.
+ *
+ * This and related audio modules make use of the [Web Audio API]{@link https://www.w3.org/TR/webaudio-1.1/}.
+ *
+ * ```js
+ * // create an AudioListener and add it to the camera
+ * const listener = new THREE.AudioListener();
+ * camera.add( listener );
+ *
+ * // create a global 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();
+ * });
+ * ```
+ *
+ * @augments Object3D
+ */
+class Audio extends Object3D {
+
+	/**
+	 * Constructs a new audio.
+	 *
+	 * @param {AudioListener} listener - The global audio listener.
+	 */
+	constructor( listener ) {
+
+		super();
+
+		this.type = 'Audio';
+
+		/**
+		 * The global audio listener.
+		 *
+		 * @type {AudioListener}
+		 * @readonly
+		 */
+		this.listener = listener;
+
+		/**
+		 * The audio context.
+		 *
+		 * @type {AudioContext}
+		 * @readonly
+		 */
+		this.context = listener.context;
+
+		/**
+		 * The gain node used for volume control.
+		 *
+		 * @type {GainNode}
+		 * @readonly
+		 */
+		this.gain = this.context.createGain();
+		this.gain.connect( listener.getInput() );
+
+		/**
+		 * Whether to start playback automatically or not.
+		 *
+		 * @type {boolean}
+		 * @default false
+		 */
+		this.autoplay = false;
+
+		/**
+		 * A reference to an audio buffer.
+		 *
+		 * Defined via {@link Audio#setBuffer}.
+		 *
+		 * @type {?AudioBuffer}
+		 * @default null
+		 * @readonly
+		 */
+		this.buffer = null;
+
+		/**
+		 * Modify pitch, measured in cents. +/- 100 is a semitone.
+		 * +/- 1200 is an octave.
+		 *
+		 * Defined via {@link Audio#setDetune}.
+		 *
+		 * @type {number}
+		 * @default 0
+		 * @readonly
+		 */
+		this.detune = 0;
+
+		/**
+		 * Whether the audio should loop or not.
+		 *
+		 * Defined via {@link Audio#setLoop}.
+		 *
+		 * @type {boolean}
+		 * @default false
+		 * @readonly
+		 */
+		this.loop = false;
+
+		/**
+		 * Defines where in the audio buffer the replay should
+		 * start, in seconds.
+		 *
+		 * @type {number}
+		 * @default 0
+		 */
+		this.loopStart = 0;
+
+		/**
+		 * Defines where in the audio buffer the replay should
+		 * stop, in seconds.
+		 *
+		 * @type {number}
+		 * @default 0
+		 */
+		this.loopEnd = 0;
+
+		/**
+		 * An offset to the time within the audio buffer the playback
+		 * should begin, in seconds.
+		 *
+		 * @type {number}
+		 * @default 0
+		 */
+		this.offset = 0;
+
+		/**
+		 * Overrides the default duration of the audio.
+		 *
+		 * @type {undefined|number}
+		 * @default undefined
+		 */
+		this.duration = undefined;
+
+		/**
+		 * The playback speed.
+		 *
+		 * Defined via {@link Audio#setPlaybackRate}.
+		 *
+		 * @type {number}
+		 * @readonly
+		 * @default 1
+		 */
+		this.playbackRate = 1;
+
+		/**
+		 * Indicates whether the audio is playing or not.
+		 *
+		 * This flag will be automatically set when using {@link Audio#play},
+		 * {@link Audio#pause}, {@link Audio#stop}.
+		 *
+		 * @type {boolean}
+		 * @readonly
+		 * @default false
+		 */
+		this.isPlaying = false;
+
+		/**
+		 * Indicates whether the audio playback can be controlled
+		 * with method like {@link Audio#play} or {@link Audio#pause}.
+		 *
+		 * This flag will be automatically set when audio sources are
+		 * defined.
+		 *
+		 * @type {boolean}
+		 * @readonly
+		 * @default true
+		 */
+		this.hasPlaybackControl = true;
+
+		/**
+		 * Holds a reference to the current audio source.
+		 *
+		 * The property is automatically by one of the `set*()` methods.
+		 *
+		 * @type {?AudioNode}
+		 * @readonly
+		 * @default null
+		 */
+		this.source = null;
+
+		/**
+		 * Defines the source type.
+		 *
+		 * The property is automatically by one of the `set*()` methods.
+		 *
+		 * @type {('empty'|'audioNode'|'mediaNode'|'mediaStreamNode'|'buffer')}
+		 * @readonly
+		 * @default 'empty'
+		 */
+		this.sourceType = 'empty';
+
+		this._startedAt = 0;
+		this._progress = 0;
+		this._connected = false;
+
+		/**
+		 * Can be used to apply a variety of low-order filters to create
+		 * more complex sound effects e.g. via `BiquadFilterNode`.
+		 *
+		 * The property is automatically set by {@link Audio#setFilters}.
+		 *
+		 * @type {Array<AudioNode>}
+		 * @readonly
+		 */
+		this.filters = [];
+
+	}
+
+	/**
+	 * Returns the output audio node.
+	 *
+	 * @return {GainNode} The output node.
+	 */
+	getOutput() {
+
+		return this.gain;
+
+	}
+
+	/**
+	 * Sets the given audio node as the source of this instance.
+	 *
+	 * {@link Audio#sourceType} is set to `audioNode` and {@link Audio#hasPlaybackControl} to `false`.
+	 *
+	 * @param {AudioNode} audioNode - The audio node like an instance of `OscillatorNode`.
+	 * @return {Audio} A reference to this instance.
+	 */
+	setNodeSource( audioNode ) {
+
+		this.hasPlaybackControl = false;
+		this.sourceType = 'audioNode';
+		this.source = audioNode;
+		this.connect();
+
+		return this;
+
+	}
+
+	/**
+	 * Sets the given media element as the source of this instance.
+	 *
+	 * {@link Audio#sourceType} is set to `mediaNode` and {@link Audio#hasPlaybackControl} to `false`.
+	 *
+	 * @param {HTMLMediaElement} mediaElement - The media element.
+	 * @return {Audio} A reference to this instance.
+	 */
+	setMediaElementSource( mediaElement ) {
+
+		this.hasPlaybackControl = false;
+		this.sourceType = 'mediaNode';
+		this.source = this.context.createMediaElementSource( mediaElement );
+		this.connect();
+
+		return this;
+
+	}
+
+	/**
+	 * Sets the given media stream as the source of this instance.
+	 *
+	 * {@link Audio#sourceType} is set to `mediaStreamNode` and {@link Audio#hasPlaybackControl} to `false`.
+	 *
+	 * @param {MediaStream} mediaStream - The media stream.
+	 * @return {Audio} A reference to this instance.
+	 */
+	setMediaStreamSource( mediaStream ) {
+
+		this.hasPlaybackControl = false;
+		this.sourceType = 'mediaStreamNode';
+		this.source = this.context.createMediaStreamSource( mediaStream );
+		this.connect();
+
+		return this;
+
+	}
+
+	/**
+	 * Sets the given audio buffer as the source of this instance.
+	 *
+	 * {@link Audio#sourceType} is set to `buffer` and {@link Audio#hasPlaybackControl} to `true`.
+	 *
+	 * @param {AudioBuffer} audioBuffer - The audio buffer.
+	 * @return {Audio} A reference to this instance.
+	 */
+	setBuffer( audioBuffer ) {
+
+		this.buffer = audioBuffer;
+		this.sourceType = 'buffer';
+
+		if ( this.autoplay ) this.play();
+
+		return this;
+
+	}
+
+	/**
+	 * Starts the playback of the audio.
+	 *
+	 * Can only be used with compatible audio sources that allow playback control.
+	 *
+	 * @param {number} [delay=0] - The delay, in seconds, at which the audio should start playing.
+	 * @return {Audio|undefined} A reference to this instance.
+	 */
+	play( delay = 0 ) {
+
+		if ( this.isPlaying === true ) {
+
+			console.warn( 'THREE.Audio: Audio is already playing.' );
+			return;
+
+		}
+
+		if ( this.hasPlaybackControl === false ) {
+
+			console.warn( 'THREE.Audio: this Audio has no playback control.' );
+			return;
+
+		}
+
+		this._startedAt = this.context.currentTime + delay;
+
+		const source = this.context.createBufferSource();
+		source.buffer = this.buffer;
+		source.loop = this.loop;
+		source.loopStart = this.loopStart;
+		source.loopEnd = this.loopEnd;
+		source.onended = this.onEnded.bind( this );
+		source.start( this._startedAt, this._progress + this.offset, this.duration );
+
+		this.isPlaying = true;
+
+		this.source = source;
+
+		this.setDetune( this.detune );
+		this.setPlaybackRate( this.playbackRate );
+
+		return this.connect();
+
+	}
+
+	/**
+	 * Pauses the playback of the audio.
+	 *
+	 * Can only be used with compatible audio sources that allow playback control.
+	 *
+	 * @return {Audio|undefined} A reference to this instance.
+	 */
+	pause() {
+
+		if ( this.hasPlaybackControl === false ) {
+
+			console.warn( 'THREE.Audio: this Audio has no playback control.' );
+			return;
+
+		}
+
+		if ( this.isPlaying === true ) {
+
+			// update current progress
+
+			this._progress += Math.max( this.context.currentTime - this._startedAt, 0 ) * this.playbackRate;
+
+			if ( this.loop === true ) {
+
+				// ensure _progress does not exceed duration with looped audios
+
+				this._progress = this._progress % ( this.duration || this.buffer.duration );
+
+			}
+
+			this.source.stop();
+			this.source.onended = null;
+
+			this.isPlaying = false;
+
+		}
+
+		return this;
+
+	}
+
+	/**
+	 * Stops the playback of the audio.
+	 *
+	 * Can only be used with compatible audio sources that allow playback control.
+	 *
+	 * @param {number} [delay=0] - The delay, in seconds, at which the audio should stop playing.
+	 * @return {Audio|undefined} A reference to this instance.
+	 */
+	stop( delay = 0 ) {
+
+		if ( this.hasPlaybackControl === false ) {
+
+			console.warn( 'THREE.Audio: this Audio has no playback control.' );
+			return;
+
+		}
+
+		this._progress = 0;
+
+		if ( this.source !== null ) {
+
+			this.source.stop( this.context.currentTime + delay );
+			this.source.onended = null;
+
+		}
+
+		this.isPlaying = false;
+
+		return this;
+
+	}
+
+	/**
+	 * Connects to the audio source. This is used internally on
+	 * initialisation and when setting / removing filters.
+	 *
+	 * @return {Audio} A reference to this instance.
+	 */
+	connect() {
+
+		if ( this.filters.length > 0 ) {
+
+			this.source.connect( this.filters[ 0 ] );
+
+			for ( let i = 1, l = this.filters.length; i < l; i ++ ) {
+
+				this.filters[ i - 1 ].connect( this.filters[ i ] );
+
+			}
+
+			this.filters[ this.filters.length - 1 ].connect( this.getOutput() );
+
+		} else {
+
+			this.source.connect( this.getOutput() );
+
+		}
+
+		this._connected = true;
+
+		return this;
+
+	}
+
+	/**
+	 * Disconnects to the audio source. This is used internally on
+	 * initialisation and when setting / removing filters.
+	 *
+	 * @return {Audio|undefined} A reference to this instance.
+	 */
+	disconnect() {
+
+		if ( this._connected === false ) {
+
+			return;
+
+		}
+
+		if ( this.filters.length > 0 ) {
+
+			this.source.disconnect( this.filters[ 0 ] );
+
+			for ( let i = 1, l = this.filters.length; i < l; i ++ ) {
+
+				this.filters[ i - 1 ].disconnect( this.filters[ i ] );
+
+			}
+
+			this.filters[ this.filters.length - 1 ].disconnect( this.getOutput() );
+
+		} else {
+
+			this.source.disconnect( this.getOutput() );
+
+		}
+
+		this._connected = false;
+
+		return this;
+
+	}
+
+	/**
+	 * Returns the current set filters.
+	 *
+	 * @return {Array<AudioNode>} The list of filters.
+	 */
+	getFilters() {
+
+		return this.filters;
+
+	}
+
+	/**
+	 * Sets an array of filters and connects them with the audio source.
+	 *
+	 * @param {Array<AudioNode>} [value] - A list of filters.
+	 * @return {Audio} A reference to this instance.
+	 */
+	setFilters( value ) {
+
+		if ( ! value ) value = [];
+
+		if ( this._connected === true ) {
+
+			this.disconnect();
+			this.filters = value.slice();
+			this.connect();
+
+		} else {
+
+			this.filters = value.slice();
+
+		}
+
+		return this;
+
+	}
+
+	/**
+	 * Defines the detuning of oscillation in cents.
+	 *
+	 * @param {number} value - The detuning of oscillation in cents.
+	 * @return {Audio} A reference to this instance.
+	 */
+	setDetune( value ) {
+
+		this.detune = value;
+
+		if ( this.isPlaying === true && this.source.detune !== undefined ) {
+
+			this.source.detune.setTargetAtTime( this.detune, this.context.currentTime, 0.01 );
+
+		}
+
+		return this;
+
+	}
+
+	/**
+	 * Returns the detuning of oscillation in cents.
+	 *
+	 * @return {number} The detuning of oscillation in cents.
+	 */
+	getDetune() {
+
+		return this.detune;
+
+	}
+
+	/**
+	 * Returns the first filter in the list of filters.
+	 *
+	 * @return {AudioNode|undefined} The first filter in the list of filters.
+	 */
+	getFilter() {
+
+		return this.getFilters()[ 0 ];
+
+	}
+
+	/**
+	 * Applies a single filter node to the audio.
+	 *
+	 * @param {AudioNode} [filter] - The filter to set.
+	 * @return {Audio} A reference to this instance.
+	 */
+	setFilter( filter ) {
+
+		return this.setFilters( filter ? [ filter ] : [] );
+
+	}
+
+	/**
+	 * Sets the playback rate.
+	 *
+	 * Can only be used with compatible audio sources that allow playback control.
+	 *
+	 * @param {number} [value] - The playback rate to set.
+	 * @return {Audio|undefined} A reference to this instance.
+	 */
+	setPlaybackRate( value ) {
+
+		if ( this.hasPlaybackControl === false ) {
+
+			console.warn( 'THREE.Audio: this Audio has no playback control.' );
+			return;
+
+		}
+
+		this.playbackRate = value;
+
+		if ( this.isPlaying === true ) {
+
+			this.source.playbackRate.setTargetAtTime( this.playbackRate, this.context.currentTime, 0.01 );
+
+		}
+
+		return this;
+
+	}
+
+	/**
+	 * Returns the current playback rate.
+
+	 * @return {number} The playback rate.
+	 */
+	getPlaybackRate() {
+
+		return this.playbackRate;
+
+	}
+
+	/**
+	 * Automatically called when playback finished.
+	 */
+	onEnded() {
+
+		this.isPlaying = false;
+		this._progress = 0;
+
+	}
+
+	/**
+	 * Returns the loop flag.
+	 *
+	 * Can only be used with compatible audio sources that allow playback control.
+	 *
+	 * @return {boolean} Whether the audio should loop or not.
+	 */
+	getLoop() {
+
+		if ( this.hasPlaybackControl === false ) {
+
+			console.warn( 'THREE.Audio: this Audio has no playback control.' );
+			return false;
+
+		}
+
+		return this.loop;
+
+	}
+
+	/**
+	 * Sets the loop flag.
+	 *
+	 * Can only be used with compatible audio sources that allow playback control.
+	 *
+	 * @param {boolean} value - Whether the audio should loop or not.
+	 * @return {Audio|undefined} A reference to this instance.
+	 */
+	setLoop( value ) {
+
+		if ( this.hasPlaybackControl === false ) {
+
+			console.warn( 'THREE.Audio: this Audio has no playback control.' );
+			return;
+
+		}
+
+		this.loop = value;
+
+		if ( this.isPlaying === true ) {
+
+			this.source.loop = this.loop;
+
+		}
+
+		return this;
+
+	}
+
+	/**
+	 * Sets the loop start value which defines where in the audio buffer the replay should
+	 * start, in seconds.
+	 *
+	 * @param {number} value - The loop start value.
+	 * @return {Audio} A reference to this instance.
+	 */
+	setLoopStart( value ) {
+
+		this.loopStart = value;
+
+		return this;
+
+	}
+
+	/**
+	 * Sets the loop end value which defines where in the audio buffer the replay should
+	 * stop, in seconds.
+	 *
+	 * @param {number} value - The loop end value.
+	 * @return {Audio} A reference to this instance.
+	 */
+	setLoopEnd( value ) {
+
+		this.loopEnd = value;
+
+		return this;
+
+	}
+
+	/**
+	 * Returns the volume.
+	 *
+	 * @return {number} The volume.
+	 */
+	getVolume() {
+
+		return this.gain.gain.value;
+
+	}
+
+	/**
+	 * Sets the volume.
+	 *
+	 * @param {number} value - The volume to set.
+	 * @return {Audio} A reference to this instance.
+	 */
+	setVolume( value ) {
+
+		this.gain.gain.setTargetAtTime( value, this.context.currentTime, 0.01 );
+
+		return this;
+
+	}
+
+	copy( source, recursive ) {
+
+		super.copy( source, recursive );
+
+		if ( source.sourceType !== 'buffer' ) {
+
+			console.warn( 'THREE.Audio: Audio source type cannot be copied.' );
+
+			return this;
+
+		}
+
+		this.autoplay = source.autoplay;
+
+		this.buffer = source.buffer;
+		this.detune = source.detune;
+		this.loop = source.loop;
+		this.loopStart = source.loopStart;
+		this.loopEnd = source.loopEnd;
+		this.offset = source.offset;
+		this.duration = source.duration;
+		this.playbackRate = source.playbackRate;
+		this.hasPlaybackControl = source.hasPlaybackControl;
+		this.sourceType = source.sourceType;
+
+		this.filters = source.filters.slice();
+
+		return this;
+
+	}
+
+	clone( recursive ) {
+
+		return new this.constructor( this.listener ).copy( this, recursive );
+
+	}
+
+}
+
+export { Audio };

node_modules/three/src/audio/AudioAnalyser.js

@@ -0,0 +1,97 @@
+/**
+ * This class can be used to analyse audio data.
+ *
+ * ```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();
+ * ```
+ */
+class AudioAnalyser {
+
+	/**
+	 * Constructs a new audio analyzer.
+	 *
+	 * @param {Audio} audio - The audio to analyze.
+	 * @param {number} [fftSize=2048] - The window size in samples that is used when performing a Fast Fourier Transform (FFT) to get frequency domain data.
+	 */
+	constructor( audio, fftSize = 2048 ) {
+
+		/**
+		 * The global audio listener.
+		 *
+		 * @type {AnalyserNode}
+		 */
+		this.analyser = audio.context.createAnalyser();
+		this.analyser.fftSize = fftSize;
+
+		/**
+		 * Holds the analyzed data.
+		 *
+		 * @type {Uint8Array}
+		 */
+		this.data = new Uint8Array( this.analyser.frequencyBinCount );
+
+		audio.getOutput().connect( this.analyser );
+
+	}
+
+	/**
+	 * Returns an array with frequency data of the audio.
+	 *
+	 * 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.
+	 *
+	 * @return {Uint8Array} The frequency data.
+	 */
+	getFrequencyData() {
+
+		this.analyser.getByteFrequencyData( this.data );
+
+		return this.data;
+
+	}
+
+	/**
+	 * Returns the average of the frequencies returned by {@link AudioAnalyser#getFrequencyData}.
+	 *
+	 * @return {number} The average frequency.
+	 */
+	getAverageFrequency() {
+
+		let value = 0;
+		const data = this.getFrequencyData();
+
+		for ( let i = 0; i < data.length; i ++ ) {
+
+			value += data[ i ];
+
+		}
+
+		return value / data.length;
+
+	}
+
+}
+
+export { AudioAnalyser };

node_modules/three/src/audio/AudioContext.js

@@ -0,0 +1,40 @@
+let _context;
+
+/**
+ * Manages the global audio context in the engine.
+ *
+ * @hideconstructor
+ */
+class AudioContext {
+
+	/**
+	 * Returns the global native audio context.
+	 *
+	 * @return {AudioContext} The native audio context.
+	 */
+	static getContext() {
+
+		if ( _context === undefined ) {
+
+			_context = new ( window.AudioContext || window.webkitAudioContext )();
+
+		}
+
+		return _context;
+
+	}
+
+	/**
+	 * Allows to set the global native audio context from outside.
+	 *
+	 * @param {AudioContext} value - The native context to set.
+	 */
+	static setContext( value ) {
+
+		_context = value;
+
+	}
+
+}
+
+export { AudioContext };

node_modules/three/src/audio/AudioListener.js

@@ -0,0 +1,216 @@
+import { Vector3 } from '../math/Vector3.js';
+import { Quaternion } from '../math/Quaternion.js';
+import { Clock } from '../core/Clock.js';
+import { Object3D } from '../core/Object3D.js';
+import { AudioContext } from './AudioContext.js';
+
+const _position = /*@__PURE__*/ new Vector3();
+const _quaternion = /*@__PURE__*/ new Quaternion();
+const _scale = /*@__PURE__*/ new Vector3();
+
+const _forward = /*@__PURE__*/ new Vector3();
+const _up = /*@__PURE__*/ new Vector3();
+
+/**
+ * The class represents a virtual listener of the all positional and non-positional audio effects
+ * in the scene. A three.js application usually creates a single listener. It is a mandatory
+ * constructor parameter for audios entities like {@link Audio} and {@link PositionalAudio}.
+ *
+ * In most cases, the listener object is a child of the camera. So the 3D transformation of the
+ * camera represents the 3D transformation of the listener.
+ *
+ * @augments Object3D
+ */
+class AudioListener extends Object3D {
+
+	/**
+	 * Constructs a new audio listener.
+	 */
+	constructor() {
+
+		super();
+
+		this.type = 'AudioListener';
+
+		/**
+		 * The native audio context.
+		 *
+		 * @type {AudioContext}
+		 * @readonly
+		 */
+		this.context = AudioContext.getContext();
+
+		/**
+		 * The gain node used for volume control.
+		 *
+		 * @type {GainNode}
+		 * @readonly
+		 */
+		this.gain = this.context.createGain();
+		this.gain.connect( this.context.destination );
+
+		/**
+		 * An optional filter.
+		 *
+		 * Defined via {@link AudioListener#setFilter}.
+		 *
+		 * @type {?AudioNode}
+		 * @default null
+		 * @readonly
+		 */
+		this.filter = null;
+
+		/**
+		 * Time delta values required for `linearRampToValueAtTime()` usage.
+		 *
+		 * @type {number}
+		 * @default 0
+		 * @readonly
+		 */
+		this.timeDelta = 0;
+
+		// private
+
+		this._clock = new Clock();
+
+	}
+
+	/**
+	 * Returns the listener's input node.
+	 *
+	 * This method is used by other audio nodes to connect to this listener.
+	 *
+	 * @return {GainNode} The input node.
+	 */
+	getInput() {
+
+		return this.gain;
+
+	}
+
+	/**
+	 * Removes the current filter from this listener.
+	 *
+	 * @return {AudioListener} A reference to this listener.
+	 */
+	removeFilter() {
+
+		if ( this.filter !== null ) {
+
+			this.gain.disconnect( this.filter );
+			this.filter.disconnect( this.context.destination );
+			this.gain.connect( this.context.destination );
+			this.filter = null;
+
+		}
+
+		return this;
+
+	}
+
+	/**
+	 * Returns the current set filter.
+	 *
+	 * @return {?AudioNode} The filter.
+	 */
+	getFilter() {
+
+		return this.filter;
+
+	}
+
+	/**
+	 * Sets the given filter to this listener.
+	 *
+	 * @param {AudioNode} value - The filter to set.
+	 * @return {AudioListener} A reference to this listener.
+	 */
+	setFilter( value ) {
+
+		if ( this.filter !== null ) {
+
+			this.gain.disconnect( this.filter );
+			this.filter.disconnect( this.context.destination );
+
+		} else {
+
+			this.gain.disconnect( this.context.destination );
+
+		}
+
+		this.filter = value;
+		this.gain.connect( this.filter );
+		this.filter.connect( this.context.destination );
+
+		return this;
+
+	}
+
+	/**
+	 * Returns the applications master volume.
+	 *
+	 * @return {number} The master volume.
+	 */
+	getMasterVolume() {
+
+		return this.gain.gain.value;
+
+	}
+
+	/**
+	 * Sets the applications master volume. This volume setting affects
+	 * all audio nodes in the scene.
+	 *
+	 * @param {number} value - The master volume to set.
+	 * @return {AudioListener} A reference to this listener.
+	 */
+	setMasterVolume( value ) {
+
+		this.gain.gain.setTargetAtTime( value, this.context.currentTime, 0.01 );
+
+		return this;
+
+	}
+
+	updateMatrixWorld( force ) {
+
+		super.updateMatrixWorld( force );
+
+		const listener = this.context.listener;
+
+		this.timeDelta = this._clock.getDelta();
+
+		this.matrixWorld.decompose( _position, _quaternion, _scale );
+
+		// the initial forward and up directions must be orthogonal
+		_forward.set( 0, 0, - 1 ).applyQuaternion( _quaternion );
+		_up.set( 0, 1, 0 ).applyQuaternion( _quaternion );
+
+		if ( listener.positionX ) {
+
+			// code path for Chrome (see #14393)
+
+			const endTime = this.context.currentTime + this.timeDelta;
+
+			listener.positionX.linearRampToValueAtTime( _position.x, endTime );
+			listener.positionY.linearRampToValueAtTime( _position.y, endTime );
+			listener.positionZ.linearRampToValueAtTime( _position.z, endTime );
+			listener.forwardX.linearRampToValueAtTime( _forward.x, endTime );
+			listener.forwardY.linearRampToValueAtTime( _forward.y, endTime );
+			listener.forwardZ.linearRampToValueAtTime( _forward.z, endTime );
+			listener.upX.linearRampToValueAtTime( _up.x, endTime );
+			listener.upY.linearRampToValueAtTime( _up.y, endTime );
+			listener.upZ.linearRampToValueAtTime( _up.z, endTime );
+
+		} else {
+
+			listener.setPosition( _position.x, _position.y, _position.z );
+			listener.setOrientation( _forward.x, _forward.y, _forward.z, _up.x, _up.y, _up.z );
+
+		}
+
+	}
+
+}
+
+export { AudioListener };

node_modules/three/src/audio/PositionalAudio.js

@@ -0,0 +1,253 @@
+import { Vector3 } from '../math/Vector3.js';
+import { Quaternion } from '../math/Quaternion.js';
+import { Audio } from './Audio.js';
+
+const _position = /*@__PURE__*/ new Vector3();
+const _quaternion = /*@__PURE__*/ new Quaternion();
+const _scale = /*@__PURE__*/ new Vector3();
+const _orientation = /*@__PURE__*/ new Vector3();
+
+/**
+ * Represents a positional audio object.
+ *
+ * ```js
+ * // create an AudioListener and add it to the camera
+ * const listener = new THREE.AudioListener();
+ * camera.add( listener );
+ *
+ * // create the PositionalAudio object (passing in the listener)
+ * const sound = new THREE.PositionalAudio( listener );
+ *
+ * // load a sound and set it as the PositionalAudio object's buffer
+ * const audioLoader = new THREE.AudioLoader();
+ * audioLoader.load( 'sounds/song.ogg', function( buffer ) {
+ * 	sound.setBuffer( buffer );
+ * 	sound.setRefDistance( 20 );
+ * 	sound.play();
+ * });
+ *
+ * // create an object for the sound to play from
+ * const sphere = new THREE.SphereGeometry( 20, 32, 16 );
+ * const material = new THREE.MeshPhongMaterial( { color: 0xff2200 } );
+ * const mesh = new THREE.Mesh( sphere, material );
+ * scene.add( mesh );
+ *
+ * // finally add the sound to the mesh
+ * mesh.add( sound );
+ *
+ * @augments Audio
+ */
+class PositionalAudio extends Audio {
+
+	/**
+	 * Constructs a positional audio.
+	 *
+	 * @param {AudioListener} listener - The global audio listener.
+	 */
+	constructor( listener ) {
+
+		super( listener );
+
+		/**
+		 * The panner node represents the location, direction, and behavior of an audio
+		 * source in 3D space.
+		 *
+		 * @type {PannerNode}
+		 * @readonly
+		 */
+		this.panner = this.context.createPanner();
+		this.panner.panningModel = 'HRTF';
+		this.panner.connect( this.gain );
+
+	}
+
+	connect() {
+
+		super.connect();
+
+		this.panner.connect( this.gain );
+
+		return this;
+
+	}
+
+	disconnect() {
+
+		super.disconnect();
+
+		this.panner.disconnect( this.gain );
+
+		return this;
+
+	}
+
+	getOutput() {
+
+		return this.panner;
+
+	}
+
+	/**
+	 * Returns the current reference distance.
+	 *
+	 * @return {number} The reference distance.
+	 */
+	getRefDistance() {
+
+		return this.panner.refDistance;
+
+	}
+
+	/**
+	 * Defines the reference distance for reducing volume as the audio source moves
+	 * further from the listener – i.e. the distance at which the volume reduction
+	 * starts taking effect.
+	 *
+	 * @param {number} value - The reference distance to set.
+	 * @return {PositionalAudio} A reference to this instance.
+	 */
+	setRefDistance( value ) {
+
+		this.panner.refDistance = value;
+
+		return this;
+
+	}
+
+	/**
+	 * Returns the current rolloff factor.
+	 *
+	 * @return {number} The rolloff factor.
+	 */
+	getRolloffFactor() {
+
+		return this.panner.rolloffFactor;
+
+	}
+
+	/**
+	 * Defines how quickly the volume is reduced as the source moves away from the listener.
+	 *
+	 * @param {number} value - The rolloff factor.
+	 * @return {PositionalAudio} A reference to this instance.
+	 */
+	setRolloffFactor( value ) {
+
+		this.panner.rolloffFactor = value;
+
+		return this;
+
+	}
+
+	/**
+	 * Returns the current distance model.
+	 *
+	 * @return {('linear'|'inverse'|'exponential')} The distance model.
+	 */
+	getDistanceModel() {
+
+		return this.panner.distanceModel;
+
+	}
+
+	/**
+	 * Defines which algorithm to use to reduce the volume of the audio source
+	 * as it moves away from the listener.
+	 *
+	 * Read [the spec]{@link https://www.w3.org/TR/webaudio-1.1/#enumdef-distancemodeltype}
+	 * for more details.
+	 *
+	 * @param {('linear'|'inverse'|'exponential')} value - The distance model to set.
+	 * @return {PositionalAudio} A reference to this instance.
+	 */
+	setDistanceModel( value ) {
+
+		this.panner.distanceModel = value;
+
+		return this;
+
+	}
+
+	/**
+	 * Returns the current max distance.
+	 *
+	 * @return {number} The max distance.
+	 */
+	getMaxDistance() {
+
+		return this.panner.maxDistance;
+
+	}
+
+	/**
+	 * Defines the maximum distance between the audio source and the listener,
+	 * after which the volume is not reduced any further.
+	 *
+	 * This value is used only by the `linear` distance model.
+	 *
+	 * @param {number} value - The max distance.
+	 * @return {PositionalAudio} A reference to this instance.
+	 */
+	setMaxDistance( value ) {
+
+		this.panner.maxDistance = value;
+
+		return this;
+
+	}
+
+	/**
+	 * Sets the directional cone in which the audio can be listened.
+	 *
+	 * @param {number} coneInnerAngle - An angle, in degrees, of a cone inside of which there will be no volume reduction.
+	 * @param {number} coneOuterAngle - An angle, in degrees, of a cone outside of which the volume will be reduced by a constant value, defined by the `coneOuterGain` parameter.
+	 * @param {number} coneOuterGain - The amount of volume reduction outside the cone defined by the `coneOuterAngle`. When set to `0`, no sound can be heard.
+	 * @return {PositionalAudio} A reference to this instance.
+	 */
+	setDirectionalCone( coneInnerAngle, coneOuterAngle, coneOuterGain ) {
+
+		this.panner.coneInnerAngle = coneInnerAngle;
+		this.panner.coneOuterAngle = coneOuterAngle;
+		this.panner.coneOuterGain = coneOuterGain;
+
+		return this;
+
+	}
+
+	updateMatrixWorld( force ) {
+
+		super.updateMatrixWorld( force );
+
+		if ( this.hasPlaybackControl === true && this.isPlaying === false ) return;
+
+		this.matrixWorld.decompose( _position, _quaternion, _scale );
+
+		_orientation.set( 0, 0, 1 ).applyQuaternion( _quaternion );
+
+		const panner = this.panner;
+
+		if ( panner.positionX ) {
+
+			// code path for Chrome and Firefox (see #14393)
+
+			const endTime = this.context.currentTime + this.listener.timeDelta;
+
+			panner.positionX.linearRampToValueAtTime( _position.x, endTime );
+			panner.positionY.linearRampToValueAtTime( _position.y, endTime );
+			panner.positionZ.linearRampToValueAtTime( _position.z, endTime );
+			panner.orientationX.linearRampToValueAtTime( _orientation.x, endTime );
+			panner.orientationY.linearRampToValueAtTime( _orientation.y, endTime );
+			panner.orientationZ.linearRampToValueAtTime( _orientation.z, endTime );
+
+		} else {
+
+			panner.setPosition( _position.x, _position.y, _position.z );
+			panner.setOrientation( _orientation.x, _orientation.y, _orientation.z );
+
+		}
+
+	}
+
+}
+
+export { PositionalAudio };