Upon cashing in 3000+ or more Kudos via a checkpoint or offensive skill, a special pendant will become available to be synthed. When equipped, it will cause a specific Anthem to be played instead of the usual randomized track.

Unlockable	How to unlock
Audiolocket 1: Beyond the Blue	1st Sumeragi.
Audiolocket 2: Nebulous Clock	Subaquatic Base.
Audiolocket 3: Azure Door	Media Tower.
Audiolocket 4: Pain from the Past	Biochem Plant.
Audiolocket 5: Scorching Journey	Datastore.
Audiolocket 6: Rouge Shimmer	Stratacombs.
Audiolocket 7: A Zip to the Moon	Pharma Lab.