Sony STR-D615 Operating Instructions Manual page 16

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The Dolby Pro Logic Surround Decoder has the same
functions for playback as movie theaters and gives a theater-
like experience in your listening room, naturally reproducing
the audio sound field.
The STR-D615 and STR-D515 incorporate a decoder which
reproduces the specially encoded surround sound of Dolby
surround video programs.
In the Dolby surround mode, select the speaker operation
mode according to your speaker configuration by pressing
the CENTER MODE button. Each time the CENTER MODE
button is pressed, the mode and the display are changed in
the following order:
[-_ PHANTOM _ 3 CH _ NORMAL _ WIDE--
CENTER MODE button
PHANTOM mode
Select this mode when you play back a Dolby surround
program source without using a center speaker. The sound
of the center channel is output from the front (L and R)
speakers.
Front speaker (L) Front speaker (R)
Rear speaker (L) Rear speaker (R)
3 CH (3 Channel LOGIC) mode
Select this mode when you play back a Dolby surround
program source only with the front and center speakers. The
sound of the rear channel is output from the front (L and R)
speakers.
Center
Front speaker (L) speaker Front speaker (R)
NORMAL mode
Select this mode if you use small center speaker. The bass
sound of the center channel is output from the front
speakers, as a small speaker cannot produce enough bass.
Center
Front speaker (L)
speaker Front speaker (R)
Rear speaker (L) Rear speaker (R)
WIDE mode
Select this mode if you use a medium to large center speaker.
Center speaker
Front speaker (L) _ Front speaker (R)
Rear speaker (L) Rear speaker (R)
Note
The Dolby Pro Logic Surround Decorder is a system to
decord the software carrying the DDl._-,M'_-olmark.
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