SoundInstance(manager, sound, options) 

Create a new SoundInstance instance.

Parameters

manager	SoundManager	The sound manager.
sound	Sound	The sound to play.
options	object	Options for the instance.
options.volume	number	The playback volume, between 0 and 1. Defaults to 1.
options.pitch	number	The relative pitch. Defaults to 1 (plays at normal pitch).
options.loop	boolean	Whether the sound should loop when it reaches the end or not. Defaults to false.
options.startTime	number	The time from which the playback will start in seconds. Default is 0 to start at the beginning. Defaults to 0.
options.duration	number	The total time after the startTime in seconds when playback will stop or restart if loop is true. Defaults to 0.
options.onPlay	function	Function called when the instance starts playing.
options.onPause	function	Function called when the instance is paused.
options.onResume	function	Function called when the instance is resumed.
options.onStop	function	Function called when the instance is stopped.
options.onEnd	function	Function called when the instance ends.

numbercurrentTime 

Gets or 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.

numberduration 

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

booleanisPaused 

Returns true if the instance is currently paused.

booleanisPlaying 

Returns true if the instance is currently playing.

booleanisStopped 

Returns true if the instance is currently stopped.

booleanisSuspended 

Returns true if the instance is currently suspended because the window is not focused.

booleanloop 

If true the instance will restart when it finishes playing.

numberpitch 

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

Soundsound 

The sound resource that the instance will play.

AudioBufferSourceNodesource 

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.

numberstartTime 

The start time from which the sound will start playing.

numbervolume 

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

clearExternalNodes() 

Clears any external nodes set by SoundInstance#setExternalNodes.

getExternalNodes() 

Gets any external nodes set by SoundInstance#setExternalNodes.

Returns

AudioNode[]

Returns an array that contains the two nodes set by SoundInstance#setExternalNodes.

pause() 

Pauses playback of sound. Call resume() to resume playback from the same position.

Returns

boolean

Returns true if the sound was paused.

play() 

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() 

Resumes playback of the sound. Playback resumes at the point that the audio was paused.

Returns

boolean

Returns true if the sound was resumed.

setExternalNodes(firstNode, [lastNode]) 

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.

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);

Parameters

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

stop() 

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.

end 

Fired when the sound currently played by the instance ends.

pause 

Fired when the instance is paused.

play 

Fired when the instance starts playing its source.

resume 

Fired when the instance is resumed.

stop 

Fired when the instance is stopped.

fire(name, [arg1], [arg2], [arg3], [arg4], [arg5], [arg6], [arg7], [arg8]) 

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

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

Parameters

name	string	Name of event to fire.
arg1	*	First argument that is passed to the event handler.
arg2	*	Second argument that is passed to the event handler.
arg3	*	Third argument that is passed to the event handler.
arg4	*	Fourth argument that is passed to the event handler.
arg5	*	Fifth argument that is passed to the event handler.
arg6	*	Sixth argument that is passed to the event handler.
arg7	*	Seventh argument that is passed to the event handler.
arg8	*	Eighth argument that is passed to the event handler.

Returns

EventHandler

Self for chaining.

hasEvent(name) 

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

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

Parameters

name

string

The name of the event to test.

Returns

boolean

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

off([name], [callback], [scope]) 

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.

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

Parameters

name	string	Name of the event to unbind.
callback	HandleEventCallback	Function to be unbound.
scope	object	Scope that was used as the this when the event is fired.

Returns

EventHandler

Self for chaining.

on(name, callback, [scope]) 

Attach an event handler to an event.

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

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

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.
scope	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.

once(name, callback, [scope]) 

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

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

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.
scope	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.