You can add a soundtrack to your project by tapping on the music icon in the toolbar, then tapping Add Music (or Change Music) and then Your Music. If you don’t find the track you’re looking for, it could be that you haven’t downloaded it to your device. In that case, go to the Apple Music app, look for the song and, if there’s a cloud icon next to it, tap it. After the download is complete, go back to the app, and you should now see that song in the list. Some tracks are protected, therefore can’t be used in our app.