Cadillac 2005 DeVille Owner's Manual page 206

Using Digital Signal Processing (DSP)
DSP: This feature is used to provide a choice of
four different listening experiences: talk, front seat,
ambience, and spacious. DSP can be used while
listening to the radio, cassette, CD, or XM™.
Press this button to turn DSP on. Press and release this
button until the desired selection appears on the display.
To turn DSP off, press and hold this button until DSP OFF
appears on the display. When DSP OFF appears on the
display, the system will provide the best overall audio
performance. The radio keeps separate DSP settings for
each band (except weather, which is always set to talk),
preset, and source.
TALK: This setting should be used when listening to
non-musical material such as news, talk shows,
sports broadcasts, and books on tape. Talk makes
spoken words sound very clear.
FRONT SEAT: This setting adjusts the audio to give the
driver the best possible sound qualities. Front seat can be
used at any time for any material. Rear seat passengers
in the vehicle may not get the same effect.
AMBIENCE: This setting is used to enhance the
stereo effect.
SPACIOUS: This setting is used to make the listening
space seem larger.
3-90
Finding a Program Type (PTY) Station
(XM™ Only)
To select and find a desired PTY perform the following:
1. Press PTY to activate program type select mode.
PTY will appear on the display.
2. Press LEVEL to select a PTY.
3. Once the desired PTY is displayed, press either
TUNE SEEK arrow to select the PTY and to take
you to the PTY's first station.
4. To go to another station within that PTY, press
TUNE SEEK once to display the PTY, then press
TUNE SEEK again to go to another station.
5. Press PTY to exit program type select mode.
If PTY times out and is no longer on the display, go
back to Step 1.
If both PTY and TA are on, the radio will search for
stations with the selected PTY and traffic
announcements.