Chevrolet 2006 Optra Owner's Manual page 172

Empty Directory or Folder
If a root directory or a folder exists somewhere in the
file structure that contains only folders/subfolders and no
compressed files directly beneath them, the player will
advance to the next folder in the file structure that
contains compressed audio files and the empty folder
will not be displayed or numbered.
No Folder
When the CD contains only compressed files, the files
will be located under the root folder. The next and
previous folder functions will have no function on a CD
that was recorded without folders or playlists. When
displaying the name of the folder the radio will
display ROOT.
When the CD contains only compressed audio files, but
no folders, all files will be located under the root
folder. When the radio displays the name of the folder,
the radio will display ROOT.
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Order of Play
Tracks will be played in the following order:
•
Playback will begin from the first track under the
root directory.
•
When all tracks from the root directory have been
played, playback will continue from files, according
to their numerical listing.
•
After playing the last track from the last folder, the
player will begin playing again at the first track of
the first folder or root directory.
File System and Naming
The song name in the ID3 tag will be displayed. If the
song name is not present in the ID3 tag, then the
radio will display the file name without the extension
(such as MP3/WMA) instead.
Track names longer than 32 characters or 4 pages will
be shortened. The display will not show parts of
words on the last page of text and the extension of the
filename will not be displayed.