Class SoundInstance

A SoundInstance plays a Sound.

Hierarchy (view full)

Constructors

constructor

Properties

source

Accessors

currentTime duration isPaused isPlaying isStopped isSuspended loop pitch 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

constructor

  • new SoundInstance(manager, sound, options): SoundInstance

  • Create a new SoundInstance instance.

    Parameters

    • manager: SoundManager

      The sound manager.

    • sound: Sound

      The sound to play.

    • options: {
          duration: number;
          loop: boolean;
          onEnd: Function;
          onPause: Function;
          onPlay: Function;
          onResume: Function;
          onStop: Function;
          pitch: number;
          startTime: number;
          volume: number;
      }

      Options for the instance.

      • duration: number

        The total time after the startTime in seconds when playback will stop or restart if loop is true. Defaults to 0.

      • loop: boolean

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

      • onEnd: Function

        Function called when the instance ends.

      • onPause: Function

        Function called when the instance is paused.

      • onPlay: Function

        Function called when the instance starts playing.

      • onResume: Function

        Function called when the instance is resumed.

      • onStop: Function

        Function called when the instance is stopped.

      • pitch: number

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

      • startTime: number

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

      • volume: number

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

    Returns SoundInstance

Properties

source

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

currentTime

duration

isPaused

isPlaying

isStopped

isSuspended

loop

pitch

sound

startTime

volume

Methods

clearExternalNodes

fire

  • fire(name, arg1?, arg2?, arg3?, arg4?, arg5?, arg6?, arg7?, arg8?): EventHandler

  • 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.

    Example

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

getExternalNodes

hasEvent

  • hasEvent(name): boolean

  • 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.

    Example

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

off

  • off(name?, callback?, scope?): EventHandler

  • 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: object

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

    Returns EventHandler

    Self for chaining.

    Example

    const handler = function () {
    };
    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

on

  • on(name, callback, scope?): EventHandle

  • 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: object = ...

      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.

    Example

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

    Example

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

once

  • once(name, callback, scope?): EventHandle

  • 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: object = ...

      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.

    Example

    obj.once('test', function (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

pause

play

  • play(): boolean

  • 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.

resume

setExternalNodes

  • setExternalNodes(firstNode, lastNode?): void

  • 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

    Example

    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);

stop

Events

StaticEVENT_END

EVENT_END: string = 'end'

Fired when the sound currently played by the instance ends.

Example

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

StaticEVENT_PAUSE

EVENT_PAUSE: string = 'pause'

Fired when the instance is paused.

Example

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

StaticEVENT_PLAY

EVENT_PLAY: string = 'play'

Fired when the instance starts playing its source.

Example

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

StaticEVENT_RESUME

EVENT_RESUME: string = 'resume'

Fired when the instance is resumed.

Example

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

StaticEVENT_STOP

EVENT_STOP: string = 'stop'

Fired when the instance is stopped.

Example

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

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