GMC 2008 Envoy - Manual (Page 216)

Using an MP3
MP3/WMA Disc
MP3/WMA Format
If you burn your own MP3 disc on a personal computer:
• Make sure the MP3 files are recorded on a
CD-R disc.
• Standard audio, MP3 files, and WMA files can be
mixed on one CD.
• Make sure playlists have a .mp3 or .wpl extension,
other file extensions might not work.
• Files can be recorded with a variety of fixed or
variable bit rates. Song title, artist name, and album
is available for display by the radio when recorded
using ID3 tags version 1 and 2.
• Create a folder structure that makes it easy to find
songs while driving. Organize songs by albums
using one folder for each album. Each folder
or album should contain 18 songs or less.
• Make sure to finalize the disc when burning an MP3
disc, using multiple sessions. It is usually better to
burn the disc all at once.
The player is able to read and play a maximum of
253 folders, 50 playlists, 20 sessions, and 949 files.
Long file names, folder names, or playlist names may
use more disc memory space than necessary.
To conserve space on the disc, minimize the length
of the file, folder, or playlist names. An MP3 CD that
was recorded using no file folders can also be played.
The system can support up to 11 folders in depth, though,
keep the depth of the folders to a minimum in order to
keep down the complexity and confusion in trying to
locate a particular folder during playback. If a CD
contains more than the maximum of 253 folders,
50 playlists, 20 sessions, and 949 files, the player
lets you access and navigate up to the maximum,
but all items over the maximum are played.
Root Directory
The root directory is treated as a folder. If the root
directory has compressed audio files, the directory
displays as F1 ROOT. All files contained directly under
the root directory are accessed prior to any root directory
folders. However, playlists (Px) are always accessed
before root folders or files.
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
advances to the next folder in the file structure that
contains compressed audio files. The empty folder
does not display.
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