A global Audio Manager can centralize shared music and SFX.

public class AudioManager : MonoBehaviour
{
    public static AudioManager Instance;

    [SerializeField]
    private AudioSource musicSource;

    [SerializeField]
    private AudioSource sfxSource;

    void Awake()
    {
        if (Instance != null &&
            Instance != this)
        {
            Destroy(gameObject);
            return;
        }

        Instance = this;
        DontDestroyOnLoad(
            gameObject
        );
    }

    public void PlaySFX(
        AudioClip clip)
    {
        sfxSource.PlayOneShot(
            clip
        );
    }
}