Engine API Reference - v2.7.2
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    Class SoundInstance3d

    A SoundInstance3d plays a Sound in 3D.

    Hierarchy (View Summary)

    Index

    Constructors

    constructor

    Properties

    source

    Accessors

    currentTime distanceModel duration isPaused isPlaying isStopped isSuspended loop maxDistance pitch position refDistance rollOffFactor sound startTime volume

    Methods

    clearExternalNodes fire getExternalNodes hasEvent off on once pause play resume setExternalNodes stop

    Events

    EVENT_END EVENT_PAUSE EVENT_PLAY EVENT_RESUME EVENT_STOP

    Constructors

    • Create a new SoundInstance3d instance.

      Parameters

      • manager: SoundManager

        The sound manager.

      • sound: Sound

        The sound to play.

      • options: {
            distanceModel?: string;
            duration?: number;
            loop?: boolean;
            maxDistance?: number;
            pitch?: number;
            position?: Vec3;
            refDistance?: number;
            rollOffFactor?: number;
            startTime?: number;
            volume?: number;
        } = {}

        Options for the instance.

        • OptionaldistanceModel?: string

          Determines which algorithm to use to reduce the volume of the audio as it moves away from the listener. Can be:

          Defaults to DISTANCE_LINEAR.

        • Optionalduration?: number

          The total time after the startTime when playback will stop or restart if loop is true.

        • Optionalloop?: boolean

          Whether the sound should loop when it reaches the end or not. Defaults to false.

        • OptionalmaxDistance?: number

          The maximum distance from the listener at which audio falloff stops. Note the volume of the audio is not 0 after this distance, but just doesn't fall off anymore. Defaults to 10000.

        • Optionalpitch?: number

          The relative pitch. Defaults to 1 (plays at normal pitch).

        • Optionalposition?: Vec3

          The position of the sound in 3D space.

        • OptionalrefDistance?: number

          The reference distance for reducing volume as the sound source moves further from the listener. Defaults to 1.

        • OptionalrollOffFactor?: number

          The factor used in the falloff equation. Defaults to 1.

        • OptionalstartTime?: number

          The time from which the playback will start. Default is 0 to start at the beginning.

        • Optionalvolume?: number

          The playback volume, between 0 and 1. Defaults to 1.

      Returns SoundInstance3d

    Properties

    source: AudioBufferSourceNode = null

    Gets the source that plays the sound resource. If the Web Audio API is not supported the type of source is Audio. Source is only available after calling play.

    Accessors

    • get currentTime(): number

      Gets the current time of the sound that is playing.

      Returns number

    • set currentTime(value: number): void

      Sets the current time of the sound that is playing. If the value provided is bigger than the duration of the instance it will wrap from the beginning.

      Parameters

      • value: number

      Returns void

    • get duration(): number

      Gets the duration of the sound that the instance will play starting from startTime.

      Returns number

    • set duration(value: number): void

      Sets the duration of the sound that the instance will play starting from startTime.

      Parameters

      • value: number

      Returns void

    • get isPaused(): boolean

      Gets whether the instance is currently paused.

      Returns boolean

    • get isPlaying(): boolean

      Gets whether the instance is currently playing.

      Returns boolean

    • get isStopped(): boolean

      Gets whether the instance is currently stopped.

      Returns boolean

    • get isSuspended(): boolean

      Gets whether the instance is currently suspended because the window is not focused.

      Returns boolean

    • get loop(): boolean

      Gets whether the instance will restart when it finishes playing.

      Returns boolean

    • set loop(value: boolean): void

      Sets whether the instance will restart when it finishes playing.

      Parameters

      • value: boolean

      Returns void

    • get maxDistance(): number

      Gets the maximum distance from the listener at which audio falloff stops.

      Returns number

    • set maxDistance(value: number): void

      Sets the maximum distance from the listener at which audio falloff stops. Note that the volume of the audio is not 0 after this distance, but just doesn't fall off anymore.

      Parameters

      • value: number

      Returns void

    • get pitch(): number

      Gets the pitch modifier to play the sound with.

      Returns number

    • set pitch(pitch: number): void

      Sets the pitch modifier to play the sound with. Must be larger than 0.01.

      Parameters

      • pitch: number

      Returns void

    • get refDistance(): number

      Gets the reference distance for reducing volume as the sound source moves further from the listener.

      Returns number

    • set refDistance(value: number): void

      Sets the reference distance for reducing volume as the sound source moves further from the listener.

      Parameters

      • value: number

      Returns void

    • get startTime(): number

      Gets the start time from which the sound will start playing.

      Returns number

    • set startTime(value: number): void

      Sets the start time from which the sound will start playing.

      Parameters

      • value: number

      Returns void

    • get volume(): number

      Gets the volume modifier to play the sound with. In range 0-1.

      Returns number

    • set volume(volume: number): void

      Sets the volume modifier to play the sound with. In range 0-1.

      Parameters

      • volume: number

      Returns void

    Methods

    • Fire an event, all additional arguments are passed on to the event listener.

      Parameters

      • name: string

        Name of event to fire.

      • Optionalarg1: any

        First argument that is passed to the event handler.

      • Optionalarg2: any

        Second argument that is passed to the event handler.

      • Optionalarg3: any

        Third argument that is passed to the event handler.

      • Optionalarg4: any

        Fourth argument that is passed to the event handler.

      • Optionalarg5: any

        Fifth argument that is passed to the event handler.

      • Optionalarg6: any

        Sixth argument that is passed to the event handler.

      • Optionalarg7: any

        Seventh argument that is passed to the event handler.

      • Optionalarg8: any

        Eighth argument that is passed to the event handler.

      Returns EventHandler

      Self for chaining.

      obj.fire('test', 'This is the message');

    • Test if there are any handlers bound to an event name.

      Parameters

      • name: string

        The name of the event to test.

      Returns boolean

      True if the object has handlers bound to the specified event name.

      obj.on('test', () => {}); // bind an event to 'test'
      obj.hasEvent('test'); // returns true
      obj.hasEvent('hello'); // returns false

    • Detach an event handler from an event. If callback is not provided then all callbacks are unbound from the event, if scope is not provided then all events with the callback will be unbound.

      Parameters

      • Optionalname: string

        Name of the event to unbind.

      • Optionalcallback: HandleEventCallback

        Function to be unbound.

      • Optionalscope: any

        Scope that was used as the this when the event is fired.

      Returns EventHandler

      Self for chaining.

      const handler = () => {};
      obj.on('test', handler);

      obj.off(); // Removes all events
      obj.off('test'); // Removes all events called 'test'
      obj.off('test', handler); // Removes all handler functions, called 'test'
      obj.off('test', handler, this); // Removes all handler functions, called 'test' with scope this

    • Attach an event handler to an event.

      Parameters

      • name: string

        Name of the event to bind the callback to.

      • callback: HandleEventCallback

        Function that is called when event is fired. Note the callback is limited to 8 arguments.

      • Optionalscope: any = ...

        Object to use as 'this' when the event is fired, defaults to current this.

      Returns EventHandle

      Can be used for removing event in the future.

      obj.on('test', (a, b) => {
          console.log(a + b);
      });
      obj.fire('test', 1, 2); // prints 3 to the console

      const evt = obj.on('test', (a, b) => {
          console.log(a + b);
      });
      // some time later
      evt.off();

    • Attach an event handler to an event. This handler will be removed after being fired once.

      Parameters

      • name: string

        Name of the event to bind the callback to.

      • callback: HandleEventCallback

        Function that is called when event is fired. Note the callback is limited to 8 arguments.

      • Optionalscope: any = ...

        Object to use as 'this' when the event is fired, defaults to current this.

      Returns EventHandle

      • can be used for removing event in the future.
      obj.once('test', (a, b) => {
          console.log(a + b);
      });
      obj.fire('test', 1, 2); // prints 3 to the console
      obj.fire('test', 1, 2); // not going to get handled

    • Attempt to begin playback the sound. If the AudioContext is suspended, the audio will only start once it's resumed. If the sound is already playing, this will restart the sound.

      Returns boolean

      True if the sound was started immediately.

    • Connects external Web Audio API nodes. You need to pass the first node of the node graph that you created externally and the last node of that graph. The first node will be connected to the audio source and the last node will be connected to the destination of the AudioContext (e.g. speakers). Requires Web Audio API support.

      Parameters

      • firstNode: AudioNode

        The first node that will be connected to the audio source of sound instances.

      • OptionallastNode: AudioNode

        The last node that will be connected to the destination of the AudioContext. If unspecified then the firstNode will be connected to the destination instead.

      Returns void

      const context = app.systems.sound.context;
      const analyzer = context.createAnalyzer();
      const distortion = context.createWaveShaper();
      const filter = context.createBiquadFilter();
      analyzer.connect(distortion);
      distortion.connect(filter);
      instance.setExternalNodes(analyzer, filter);

    • Stops playback of sound. Calling play() again will restart playback from the beginning of the sound.

      Returns boolean

      Returns true if the sound was stopped.

    Events

    EVENT_END: string = 'end'

    Fired when the sound currently played by the instance ends.

    instance.on('end', () => {
        console.log('Instance ended');
    });
    EVENT_PAUSE: string = 'pause'

    Fired when the instance is paused.

    instance.on('pause', () => {
        console.log('Instance paused');
    });
    EVENT_PLAY: string = 'play'

    Fired when the instance starts playing its source.

    instance.on('play', () => {
        console.log('Instance started playing');
    });
    EVENT_RESUME: string = 'resume'

    Fired when the instance is resumed.

    instance.on('resume', () => {
        console.log('Instance resumed');
    });
    EVENT_STOP: string = 'stop'

    Fired when the instance is stopped.

    instance.on('stop', () => {
        console.log('Instance stopped');
    });

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