private void Update()
 {
     //vamos con los controles
     if (Input.GetKeyUp(KeyCode.Joystick1Button2) || Input.GetKeyDown(KeyCode.Z))
     {
         audioSystem.PlayById(1);
     }
     if (Input.GetKeyUp(KeyCode.Joystick1Button3) || Input.GetKeyDown(KeyCode.X))
     {
         audioSystem.PlayById(2);
     }
     if (Input.GetKeyUp(KeyCode.Joystick1Button1) || Input.GetKeyDown(KeyCode.X) || Input.GetKeyDown(KeyCode.Z))
     {
         audioSystem.PlayById(3);
     }
 }