Volvo V70 Owner's Manual page 167

Dolby Surround Pro Logic
Dolby Surround Pro Logic together with a
centre loudspeaker in the dashboard offers
you a sound experience very close to reality.
The normal left - right stereo channels are
divided to left - centre - right. In addition,
ambient surround sound is produced by the
rear loudspeakers. This ambient surround
sound mirrors the resonance in the recording
studio.
Most recordings toady are made so that the
vocalist/soloist is heard from straight ahead
while the orchestra is heard over the entire
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Dolby Surround Pro Logic HU-803
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left-right panorama and from behind. The
result with Dolby Surround Pro Logic is a
sound experience very close to being there.
Note that the sound experience for rear seat
passengers when using Dolby Surround Pro
Logic is different than that of the driver and
front seat passenger.
Dolby Surround Pro Logic Mode*
To select Dolby Surround Pro Logic Mode
press " PL". "Dolby Pro Logic" is
displayed. Press OFF to return to 2-channel
stereo.
* Dolby Surround Pro Logic Mode works in
CD, cassette and FM modes. If listening to a
radio transmission, select 3-channel stereo
(3-CH) instead.
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