GMC Acadia Owner's Manual page 189

Root Directory
The root directory is treated as a
folder. All files contained directly
under the root directory are
accessed prior to any root directory
folders.
Empty Folders
If a root directory or folder is empty
or contains only folders, the player
advances to the next folder in the
file structure that contains a
compressed audio file. The empty
folder(s) are not displayed or
numbered.
No Folder
When the CD only contains
compressed audio files without any
folders or playlists, all files are
under the root folder.
File System and Naming
The song titles, artists, albums, and
genres are taken from the file's ID3
tag and are only displayed if present
in the tag. If a song title is not
present in the ID3 tag, the radio
displays the file name as the
track name.
Preprogrammed Playlists
The radio recognizes
preprogrammed playlists; however,
there is no editing capability. These
playlists are treated as special
folders containing compressed
audio song files.
Music Navigator
Folders
The folder structure can support up
to five levels of depth. The folders
and then songs will display in
alphabetical order.
Infotainment System
Press one of the options from the
Root Folder to display other folders
of that option type. Keep pressing to
display each screen until all levels
have been reached. The last level
usually contains the desired song
to play.
Playlists
7-15