void Update()
 {
     if (Input.GetKeyDown(KeyCode.Q))
     {
         _songA.Play(5f);
     }
     if (Input.GetKeyDown(KeyCode.W))
     {
         _songB.Play(5f);
     }
     if (Input.GetKeyDown(KeyCode.E))
     {
         _songC.Play(5f);
     }
     if (Input.GetKeyDown(KeyCode.R))
     {
         _songD.Play(5f);
     }
     if (Input.GetKeyDown(KeyCode.A))
     {
         _soundA.PlayOneShot(transform.position);
     }
     if (Input.GetKeyDown(KeyCode.RightArrow))
     {
         MusicManager.Instance.IncreaseLayerLevel(5f);
     }
     if (Input.GetKeyDown(KeyCode.LeftArrow))
     {
         MusicManager.Instance.DecreaseLayerLevel(5f);
     }
     if (Input.GetKeyDown(KeyCode.Space))
     {
         MusicManager.Instance.StopMusic(2f);
     }
 }