01 Up M4a !exclusive!

. It was popularized by Apple as a high-quality alternative to the aging MP3 format. Compression Standards : Most M4A files use Advanced Audio Coding (AAC)

In early versions of iTunes (pre-iTunes 9), when you ripped a CD and enabled "Use custom naming scheme," users could insert arbitrary text. Some power users added "UP" to denote "Universal Playlist" or "Upbeat." Those old M4A files still circulate on external hard drives, forums, and P2P networks. 01 UP m4a