How to stop menu music when loading level (1,2,3,..,x)

Hello!

I managed to find a way to have a menu song that doesn't start over between different menu scenes, but I'd like it to stop when I load a playable level. The menu music just seems to turn to a REALLY low volume, but it is still audible.

These two scripts are taking care of the menu music. Could you please find a solution for me?

 public class MyUnitySingleton : MonoBehaviour {
     
     private static MyUnitySingleton instance = null;
 
     public static MyUnitySingleton Instance {
         get { return instance; }
     }
 
     void Awake() {
         if (instance != null && instance != this) {
             Destroy(this.gameObject);
             return;
         } else {
             instance = this;
         }
         DontDestroyOnLoad(this.gameObject);
     }
 }

.

 public class MusicManager : MonoBehaviour {
 
     public AudioClip NewMusic; //Pick an audio track to play.
     public GameObject go;
     
     void Awake () { 
         go = GameObject.Find("Game Music"); 
         //Finds the game object called Game Music, if it goes by a different name, change this. go.audio.clip = NewMusic; 
         //Replaces the old audio with the new one set in the inspector. go.audio.Play(); 
         //Plays the audio. 
     }
 }