how to play a sound as long as the player is in the scene unity code example

Example 1: music that stays when you change scene unity

using UnityEngine;
public class MusicClass : MonoBehaviour {
  private AudioSource _audioSource;
  private void Awake()
  {
    DontDestroyOnLoad(transform.gameObject);
    _audioSource = GetComponent<AudioSource>();
  }
  public void PlayMusic()
  {
    if (_audioSource.isPlaying) return;
    _audioSource.Play();
  }
  public void StopMusic()
  {
    _audioSource.Stop();
  }
}

Example 2: how to make the music last forver unity

GameObject.FindGameObjectWithTag("Music").GetComponent<MusicClass>().PlayMusic();