How To Find & Change Keys of Apple Loops in GarageBand iOS
To change the key of an Apple Loop in GarageBand iOS, click the Gear icon on the top-right side of the workspace, choose Key Signature, and then Follow Song Key. …
Apple Loops
Are Apple Loops Legal & Royalty Free?
An article on the legality of using Apple Loops, as well as a short discussion on copyright strikes on YouTube.