Same Scene AudioClip Change

Heyo!

Im setting up a game state enum. Im using an array of music files that I want to change between enum states. Ive got the main menu music working. I want it to transition a new song to the game play state. When I trigger to the game play, the song file moves into the audio clip place in the inspector, but nothing plays. My code is display what Im doing. Im obviously going wrong about. What Im doing is reassigning the element of the audioclip array to the appropriate song when the enum changes. If I set the original main menu song in Start(), I get this error:

IndexOutOfRangeException: Array index is out of range. GamePlayWaves.Start () (at Assets/Assets/Scripts/GamePlayWaves.cs:41)

Its looking for the first element in the array. But, if I place it in Awake(), I dont get the error, with the same issue...whats the dilly?

 public AudioSource            audioListener;
     public AudioClip[]             gameMusic;
     
      public int                    gameWaves = 1;
 
     public bool                    canSpawn = true;
     
     public enum GameModes
     {
         StartScreen,
         GameScreen,
         EndScreen
     }
     
     public GameModes            gameModes = GameModes.StartScreen;
     
     void Awake()
     {
         mainMenuGUI = GameObject.FindGameObjectsWithTag("MainTitle");
         audioListener = gameObject.AddComponent<AudioSource>();
         
     }
     
     void Start()
     {
         if(gameModes == GameModes.StartScreen)
         {
             audioListener.clip = gameMusic[0];
             audioListener.Play();
         }
     }
     
     // Update is called once per frame
     void Update() 
     {    
         if(Input.GetKeyDown(KeyCode.F))
         {
             gameModes = GameModes.GameScreen;
             
             audioListener.clip = gameMusic[1];
             audioListener.Play();
             
             ScreenControl();
         }
     }