19
Sound quality/sound field operations
RQT6243
Enjoying surround sound
The following chart gives a summary of this unit’s surround features.
Note
•
All the features are only effective if speakers are used. No discernible effect will be heard through headphones.
•
None of the features are effective when radio is selected as the source.
•
You may experience a reduction in sound quality when these surround systems are used with some sources. If this occurs, turn the surround
system off.
Surround system
Features
Software
DOLBY DIGITAL
(
➡
page 20)
•
Dolby Digital is a discrete 5.1 (6) channel
surround system developed for cinema
use.
The sound signals in Dolby Digital format
are compressed to 1/10 their original
size, allowing an entire movie to be re-
corded on a single DVD.
•
This unit automatically recognizes DVDs
that have been recorded with Dolby
Digital.
•
Not all Dolby Digital sources are record-
ed with 5.1 (6) channels.
Some sources marked Dolby Digital may
be recorded in Dolby Surround, a 2
channel system.
Software encoded with Dolby Digital can
be identified with this mark.
•
DVD
DOLBY PRO LOGIC
(
➡
page 20)
Software encoded with Dolby Surround
can be identified with this mark.
•
DVD
•
Video CD, CD
•
Laser Disc
•
Video tape
Manufactured under license from Dolby Laboratories.
“Dolby”, “Pro Logic” and the double-D symbol are trademarks
of Dolby Laboratories.
To calculate the delay time
D
1
: Distance from front speakers
D
2
: Distance from surround speakers
D
3
: Distance from center speaker
Setting the center channel delay time (Dolby Digital only):
If D
1
is equal to or
Set to 0 ms.
less than D
3
If D
3
is less than D
1
Increase 1 ms for every 30 cm (1 foot) of
difference between D
1
and D
3
.
Setting the surround channel delay time:
If D
1
is equal to or
For Dolby Digital: Set to 0 ms.
less than D
2
For Dolby Pro Logic: Set to 15 ms.
If D
2
is less than
Start at 0 ms for Dolby Digital or 15 ms for
D
1
Dolby Pro Logic, and increase by 5 ms for
every 1.5 m (5 feet) of difference between
D
1
and D
2
.
D
1
D
3
D
1
D
2
D
2
Front
speaker
(left)
Front
speaker
(right)
Center speaker
Surround speaker
(left)
Surround speaker
(right)
A
Refer page 21 for operation.
Dolby Pro Logic is a decoding system that
was developed to get a better sense of
presence from sources encoded with
Dolby Surround. The balance of sound
has been improved by the addition of a
separate center speaker channel.
