constructor( audio, params = {} ) {

			this.audio = audio;
			this.elapsedTime = 0.0;
			this.currentTime = 0.0;
			this.delayTime = params.delayTime !== undefined ? params.delayTime : 0.0;
			this.audioDuration = this.audio.buffer.duration;
			this.duration = this.audioDuration + this.delayTime;

		}
@param {THREE.Audio} audio
@param {Object} params - (optional)
@param {Nuumber} params.delayTime