MainSoundScript.cs

using UnityEngine;
using System.Collections;

public class MainSoundScript: MonoBehaviour {

	public bool dontDestroyEnabled = true;

	private static MainSoundScript instance = null;

	public static MainSoundScript Instance {
		get { return instance; }
	}

	void Awake () {
		if (instance != null && instance != this) {
			Destroy(this.gameObject);
			return;
		} else {
			instance = this;
		}
		DontDestroyOnLoad(this.gameObject);
	}

}