You can add background music and sound effects to any iOS app
You just add music file(s) to the project and play them anytime you want
To play two or more musics cuncurrently,play each on a separate player.
MusicManager initializer takes one parameter and that is number of players.
Feel free to update the code to add/remove players as it may fit to your project
You can either use the Music class or just simply pass File name and Extension of the music file to a player in MusicManager and play it