.ITLP File Extension
What is an ITLP file?
Bundled album file used by iTunes, a music shopping, management, and playback program; contains a DRM-free album audio as well as optional videos, photos, and other album content; supports 256kbps AAC audio and high-definition video; used for storing and playing the "deluxe" versions of albums downloaded from the iTunes music store.
Apple provides a default template for iTunes LP developers. The template includes seven user screens which can be used to customize new albums: Home, Song List, Lyrics, Photos, Videos, Liner Notes, and Credits. Apple's TuneKit can also be used for customizing ITLP albums.
NOTE: ITLP files were introduced with iTunes 9. They are stored in the same format as .ITE files.