The OfflineAudioCompletionEvent() constructor of the Web Audio API creates a new OfflineAudioCompletionEvent object.
Note: You wouldn't generally use the constructor manually. OfflineAudioCompletionEvent events are dispatched to OfflineAudioContext instances for legacy reasons.
new OfflineAudioCompletionEvent(type, options)typeA string with the name of the event. It is case-sensitive and browsers set it to complete.
optionsAn object that, in addition of the properties defined in Event(), can have the following properties:
renderedBufferThe rendered AudioBuffer containing the audio data.
A new OfflineAudioCompletionEvent object.