How to keep variables with DontDestroyOnLoad unity - unity3d

Question

I'm quite new to unity and programming in general and I'm using "DontDestroyOnLoad (gameObject);" in a script that manages the all sounds played in the game, I run in to a problem that things like pause and unpause stop working when I load into another scene even though DondtDestroyOnLoad is on, it gives me a NullReferenceException error so i think that when loading a new scene it empty's the variables. does anyone now a way to prevent that from happening?
using UnityEngine.Audio;
using System;
using UnityEngine;
using Random=UnityEngine.Random;
public class AudioManager : MonoBehaviour
{
public Sound[] sounds;
public static AudioManager instance;
void Awake() {
if (instance == null) {
instance = this;
}
else {
Destroy(gameObject);
return;
}
DontDestroyOnLoad (gameObject);
foreach (Sound s in sounds) {
s.source = gameObject.AddComponent<AudioSource>();
s.source.clip = s.clip;
s.source.volume = s.volume;
if (s.randompitch == false) {
s.source.pitch = s.pitch;
}
s.source.loop = s.loop;
if (s.playonstart == true) {
Play(s.name);
}
}
}
public void Play (string name) {
Sound s = Array.Find(sounds, sound => sound.name == name);
if (s == null){
Debug.LogWarning("there is no" + name);
return;
}
if (s.randompitch == true ) {
s.source.pitch = Random.Range(s.randompitchmin, s.randompitchmax);
}
s.source.Play();
}
public void SoundPause (string name) {
Sound s = Array.Find(sounds, sound => sound.name == name);
if (s == null){
Debug.LogWarning("there is no" + name);
return;
}
s.source.Pause();
}
public void SoundUnPause (string name) {
Sound s = Array.Find(sounds, sound => sound.name == name);
if (s == null){
Debug.LogWarning("there is no" + name);
return;
}
s.source.UnPause();
}
}

Answer 1

You can add DontDestroyOnLoad to its array
like this
for(int i = 0; i < sounds.Length;)
{
DontDestroyOnLoad(sounds[i]);
i++;
}
Or you can search for sounds in Scane
by using :
GameObject.Find
GameObject.FindGameObjectsWithTag
Object.FindObjectOfType
EDIT
for(int i = 0; i < sounds.Length;)
{
DontDestroyOnLoad(sounds[i].GetComponent<GameObject>());
i++;
}