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Additional Information
Early reflections
Glossary
Centre mode
Setting of speakers to enhance Dolby Pro
Logic Surround mode. To obtain the best
possible surround sound, select one of the
following four centre modes according to
your speaker system.
• NORMAL mode
Select NORMAL mode if you have front
and rear speakers and a small centre
speaker. Since a small speaker cannot
produce enough bass, the bass sound of
the centre channel is output from the front
speakers.
• WIDE mode
Select WIDE mode if you have front and
rear speakers and a large centre speaker.
With the WIDE mode, you can take full
advantage of Dolby Surround sound.
• PHANTOM mode
Select PHANTOM mode if you have front
and rear speakers but no centre speaker.
The sound of the centre channel is output
from the front speakers.
• 3 CH LOGIC mode
Select 3 CH LOGIC mode if you have front
and centre speakers but no rear speaker.
The sound of the rear channel is output
from the front speakers to let you
experience some of the surround sound
without using rear speakers.
Dolby Pro Logic Surround
Decoding system of Dolby Surround sound
standardized in TV programmes and movies.
Compared with the former Dolby Surround
system, Dolby Pro Logic Surround improves
sound image by using four separate channels:
off-screen audio effects, on-screen dialog,
left-to-right panning, and music. These
channels manipulate the sound to be heard
and enhance the action as it happens on the
screen. To take advantage of Dolby Pro Logic,
you should have at least one pair of rear
speakers and/or one centre speaker. You also
need to select the appropriate centre mode to
enjoy a full effect.
Dolby Surround
Encoding and decoding system of Dolby
Surround sound for consumer use. Dolby
Surround decodes the extra channels on the
Dolby Surround-encoded sound tracks of
movie videos and TV programmes and
produces sound effects and echoes that make
the action seem to envelop you.
The processor offers Dolby Surround as one
of the pre-programmed sound fields. If you
have rear or centre speaker(s), we
recommend that you customize the Dolby
Surround sound field by selecting the
appropriate centre mode to take advantage of
Dolby Pro Logic Surround sound.
Surround sound
Sound that consists of three elements: direct
sound, early reflected sound (early
reflections) and reverberative sound
(reverberation). The acoustics where you hear
the sound affect the way these three sound
elements are heard. These sound elements are
combined in such a way that you can actually
feel the size and the type of a concert hall.
Centre
speaker
Rear
speaker (R)
Rear
speaker (L)
Front
speaker (R)
Front
speaker (L)
Centre
speaker
Rear
speaker (R)
Rear
speaker (L)
Front
speaker (R)
Front
speaker (L)
Front
speaker (L)
Front
speaker (R)
Rear
speaker (R)
Rear
speaker (L)
Centre
speaker
Front
speaker (R)
Front
speaker (L)
Reverberation
Direct sound
Early
reflections Reverberation
Level
Early reflection time
Time
3 CH LOGIC
Centre
Front (R)
Front (L)
NORMAL/WIDE
Rear (L, R)
Rear (L, R)
PHANTOM
Front (L, R)
Direct sound
• Types of sound
• Transition of sound from rear speakers
Test tone
Signal given out by the processor for
adjusting the speaker volume. The test tone
will come out as follows:
• In a system with a centre speaker
(NORMAL/WIDE/3 CH LOGIC modes)
The test tone is output from the front L
(left), centre, front R (right), and rear
speakers in succession.
• In a system without a centre speaker
(PHANTOM mode)
The test tone is output from the front and
the rear speakers alternately.