hidden track

plural hidden tracks

1. A piece of audio that has been placed on a medium, typically a CD, in such a way as to avoid detection by the casual listener.

   1 more example

   Nirvana was no stranger to hidden tracks. Nevermind featured the abrasive jam “Endless, Nameless,” which appeared ten minutes after the last song, the quiet and contemplative “Something in the Way.” In 1991 hidden tracks were relatively rare but, in the wake of Nevermind's success and influence, they began appearing everywhere.

   2023, Jeff Gomez, There Was No Alternative: Generation X, AIDS, and the Making of a Classic Nineties Record, McFarland, →ISBN

   Synonyms: ghost track