GMC 2009 Sierra - Manual (Page 242)

RDM (Random): With the random setting, MP3/WMA
files on the CD-R or CD-RW can be listened to in
random, rather than sequential order. To play MP3/WMA
files from the CD-R or CD-RW you are listening to in
random order, press the pushbutton positioned
under the RDM label until Random Current Disc
displays. Press the same pushbutton again to turn off
random play.
h
(Music Navigator): Use the music navigator
feature to play MP3/WMA files on the CD-R or CD-RW
in order by artist or album. Press the pushbutton
located below the music navigator label. The player
scans the disc to sort the files by artist and album ID3
tag information. It could take several minutes to scan
the disc depending on the number of MP3/WMA
files recorded to the CD-R or CD-RW.
To cancel music navigator while the player is scanning,
press the pushbutton located below the music
navigator label or eject the disc.
The radio can begin playing while it is scanning the disc
in the background. When the scan is finished, the
CD-R or CD-RW begins playing again.
Once the disc has been scanned, the player defaults to
playing MP3/WMA files in order by artist. The current
artist playing is shown on the second line of the display
between the arrows. If you want to listen to MP3/WMA
files by another artist, press the pushbutton located
below either arrow button. The disc goes to the next or
previous artist in alphabetical order. Continue pressing
either button until the desired artist is displayed.
To change from playback by artist to playback by album,
press the pushbutton located below the Sort By label.
From the sort screen, push one of the buttons below the
album button. Press the pushbutton below the back
label to return to the main music navigator screen. Now
the album name displays on the second line between
the arrows and songs from the current album begin
to play. Once all songs from that album are played, the
player moves to the next album in alphabetical order
on the CD-R or CD-RW and begins playing MP3/WMA
files from that album.
To exit music navigator mode, press the pushbutton
below the Back label to return to normal MP3/WMA
playback.
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