For syncing events with audio. (For Unity3d)

Seeker.cs

using UnityEngine;
using System.Collections;

[AddComponentMenu("Scripts/BGM/Seeker")]
public class Seeker : MonoBehaviour
{
	public float seekTime {
		get {
			return isSeeking ? (float)AudioSettings.dspTime - startTimeByDspTime : 0;
		}
	}

	float startTimeByDspTime;

	bool isSeeking = false;

	public void StartSeeking ()
	{
		isSeeking = true;
		startTimeByDspTime = (float)AudioSettings.dspTime;
	}

	public void StopSeeking ()
	{
		startTimeByDspTime = 0;
		isSeeking = false;
	}
}