Transition from one background music to another.

So I am looking to make it so that when an enemy AI sees my character the background music transitions to a ‘battle’ music and when it does not see the character the normal background music plays.

If you make a blueprint with an Audio component, you can play certain sounds and fade them in and out.

If you just are using two music-tracks here are a couple of solutions: One using a fade with a Timeline and another fading with a Continous Modulator. You can alsao lerp or lerp to depending on your setup.