Pontiac 2007 Torrent Owner's Manual page 224

Adjusting the Speakers (Balance/Fade)
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BAL/FADE (Balance/Fade): To adjust the
balance or fade, press this button or the tune knob
until the desired speaker control label appears
on the display. Turn the tune knob clockwise
or counterclockwise to adjust the setting.
Radio Messages
Calibration Error: The audio system has been
calibrated for your vehicle from the factory. If
Calibration Error appears on the display, it means
that the radio has not been configured properly
for your vehicle and it must be returned to
your dealer for service.
Loc (Locked): This message is displayed when
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the THEFTLOCK system has locked up the radio.
Take the vehicle to your dealer for service.
If any error occurs repeatedly or if an error cannot
be corrected, contact your dealer.
Playing a CD (Single CD Player)
Insert a CD partway into the slot, label side up.
The player pulls it in and the CD should begin
playing.
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If the ignition or radio is turned off with a CD in the
player, it stays in the player. When the ignition or
radio is turned on, the CD starts playing where it
stopped, if it was the last selected audio source.
When a CD is inserted, the CD symbol appears on
the radio display. As each new track starts to
play, the track number appears on the display.
The CD player can play the smaller 3 inch (8 cm)
single CDs with an adapter ring. Full-size CDs and
the smaller CDs are loaded in the same manner.
If playing a CD-R, the sound quality may be
reduced due to CD-R quality, the method of
recording, the quality of the music that has been
recorded, and the way the CD-R has been
handled. There may be an increase in skipping,
difficulty in finding tracks, and/or difficulty in loading
and ejecting. If these problems occur, check the
bottom surface of the CD. If the surface of the CD
is damaged, such as cracked, broken, or
scratched, the CD will not play properly. If the
surface of the CD is soiled, see Care of Your CDs
and DVDs on page 288 for more information.
If there is no apparent damage, try a known
good CD.