Our Pro subscription service gives you the option to add background music to your projects and provides a list of licensed tracks to choose from. You can also use audio from your iTunes library, but if you want to add a song from Spotify, Apple Music, or another streaming service, you may encounter Digital Rights Management (DRM) restrictions.

Every track in Spotify and Apple Music is protected by DRM. Even paid users (Premium and Family) can’t take the downloaded albums and playlists outside of these apps. This is because paying for a streaming service doesn't give you the right to make use of the tracks other than listening to them.  

In order to own the tracks and use them on your 1SE projects, you'll need to purchase them from the iTunes Store. Learn more about this feature here.