GMC 2011 Sierra Denali Owner's Manual page 213

MP3 and WMA Supported
Files
Format
The radio can play .mp3 or .wma
files that were recorded onto a
CD-R or CD-RW disc.
Compressed Audio or Mixed
Mode Discs
The radio plays discs that contain
both uncompressed CD audio and
MP3/WMA files depending on which
slot the disc is loaded into.
The DVD player only reads
uncompressed audio and ignores
MP3/WMA files on a mixed
mode disc.
The CD player reads both
uncompressed audio and
MP3/WMA files on a mixed mode
disc. Uncompressd audio is played
before MP3/WMA files. Press the
CAT (category) button to toggle
between uncompressed audio and
MP3/WMA files.
CD R or CD RW Supported File
and Folder Structure
The DVD player supports:
Up to 255 folders.
Up to 8 folders in depth.
Up to 15 playlists.
Up to 40 sessions.
Playlists with an .m3u or .wpl
extension.
Files with an .mp3, .wma, or .cda
file extension.
The CD player supports:
Up to 512 files and folders.
Up to 8 folders in depth.
Playlists with an .m3u or .wpl
extension.
Files with an .mp3, .wma, or .cda
file extension.
Infotainment System
Root Directory
The root directory of the disc is
treated as a folder. If the root
directory has compressed audio
files, the directory displays as
F1 ROOT on the radio.
If a disc contains both
uncompressed CD audio and
MP3/WMA files, a folder under the
root directory called CD accesses
all of the CD audio tracks on
the disc.
Empty Folder
Folders that do not contain files are
skipped, and the player advances to
the next folder that contains files.
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