While there are numerous other ways to integrate an advanced music system, you have now been using some of the most fundamental methods hands on, to create one. You learned how to set States when the Player enters a Trigger or used a Game Parameter to control a specific music layers based on a property in Unity. You also used callback notifications from the region theme to post the enemy theme, demonstrating one way of tailoring a music system for a special scenario. As such, this lesson has shown you how you can combine the techniques you learned in previous lessons, into even more advanced applications.