Buick 2007 Rendezvous Owner's Manual page 256

To adjust both tone controls and both speaker
controls to the middle position, first exit the audio
mode by waiting five seconds without making
any changes. Then push and hold the AUDIO knob
for more than two seconds until you hear a
beep. ALL CENTERED displays.
EQ (Equalizer): Press this button to select
customized equalization settings designed for
country/western, jazz, talk, pop, rock, and
classical.
Adjusting the Speakers (Balance/Fade)
AUDIO: To adjust the balance between the
right and the left speakers, push and release the
AUDIO knob until BAL (balance) displays.
Then turn the AUDIO knob to move the sound
toward the right or the left speakers. A bar graph
with indicators shows how the sound is balanced.
To adjust the fade between the front and the
rear speakers, push and release the AUDIO knob
until FADE displays. Then turn the AUDIO
knob to move the sound toward the front or the
rear speakers. A bar graph with indicators shows
how the sound is balanced.
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To adjust balance or fade to the middle position,
select BAL or FADE. Then push and hold the
AUDIO knob for more than two seconds until you
hear a beep. The indicator is centered on the
display.
To adjust both tone controls and both speaker
controls to the middle position, first exit the audio
mode by waiting five seconds without making
any changes. Then push and hold the AUDIO knob
for more than two seconds until a beep sounds.
ALL CENTERED displays.
Finding a Program Type (PTY) Station
(RDS and XM™)
To select and find a desired PTY perform the
following:
1. Press P-TYP to activate program type select
mode. The PTY symbol displays.
2. Turn the AUDIO knob to select a PTY.
3. Once the desired PTY displays, press either
SEEK arrow to select the PTY to go to the
PTY's first station.