Well again, I don't know what you used to play the music. All AudioSource components will be destroyed unless they were marked as DontDestroyOnLoad. In Windward I purposely left the music on a separate game object that travels from one scene to another so that it doesn't get interrupted.
In any case, this is a question for Unity. As I mentioned neither of the two add-ons has anything to do with music, so everything you do there is all Unity.