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ual taste and the acoustic conditions in
your listening room or home theater.
The factory setting is appropriate for
most rooms, but some installations cre-
ate an uncommon distance between the
front and surround speakers that may
cause the arrival of front channel sounds
to become disconnected from surround
channel sounds.
To re-synchronize the front and surround
channels, follow these steps:
1. Measure the distance from the lis-
tening/viewing position to the front
speakers.
2. Measure the distance from the lis-
tening/viewing position to the sur-
round speakers.
3. Subtract the distance to the sur-
round speakers from the distance to
the front speakers and add 15. The
resulting number is the ideal delay
time for your room. For example,
if the front speakers are 10 feet away
and the surround speakers are 5
feet away, the formula will be
"10–5+15=20". Thus, the correct
delay time in this room would be
20ms.
NOTE: The delay time may only be
adjusted in certain modes.
If the delay time needs to be changed,
it may be increased by pressing the
button
@ p
on the front
DELAY
panel. The delay time will be briefly
displayed on the video menus as well as
the front panel.
In addition to the use of the delay time
formula, it is a good idea to understand
the features of each of the AVR80
round modes when entering delay time.
The chart on the next page provides an
explanation of the suggested for each
mode. The chart also contains the delay
time limits for each of the modes.
Advanced Features
Direct Digital Decoding
The AVR80
's digital signal processing
II
uses sophisticated microprocessors and
advanced digital audio engines that
manipulate sound in the digital domain.
In order to work with sound, these cir-
cuits must first convert the incoming
analog audio input to a digital signal.
After processing, the digital audio signal
must be converted back to analog for vol-
ume control and amplification.
While the digital to analog (D/A) and
analog to digital (A/D) circuits in the
AVR80
are high quality, any time an
II
audio signal is digitized or reconstructed
to analog there is the possibility of quali-
ty loss. This helps you to avoid un-needed
A/D and D/A conversion from any laser
disc player equipped with a coaxial digi-
tal output.
If your player has this type of output,
connect the LD player to the AVR80
with a high quality digital or coax inter-
connect. The connection should be made
to the
LD DIGITAL IN
rear panel.
Once this connection is made, the
AVR80
will accept the digital output
II
directly from your LD player. To select the
direct digital input, press the LD button
and hold it for three seconds. This
7c
means that audio signals will remain in
their pure digital state until after all sur-
round processing has taken place.
NOTE: This connection is for standard
two channel 44.1 kHz PCM digital audio,
as provided by LD or CD machines. It is
NOT an input for multichannel digital
audio signals such AC-3 or DTS. Improper
connection to the wrong type of digital
's sur-
II
output may cause damage to the AVR80
or other components in your audio system
and are not covered by the AVR80
ranty. Consult your dealer or installer if
you have any questions about this input.
31
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6 Channel Direct Operation
Since 1993, an increasing number of
theatrical motion pictures have been
recorded with digital sound tracks.
With these new processes such as Dolby
Surround Digital
™
, DTS
®
and Sony's
SDDS
®
, five or more discrete sound
channels are available along with a dedi-
cated subwoofer channel for low frequen-
cy sounds. The replacement of analog
matrix theatrical audio, such as Dolby
Stereo with these new systems has greatly
increased the enjoyment of movie sound.
Advances in electronics technology now
make it possible to bring these discrete
digital audio soundtracks into your
home. Many of today's new LD players
and an increasing number of LD movie
releases provide for Dolby Digital sound-
tracks. In the future, high definition tele-
vision (HDTV) broadcasts will also carry
multichannel digital audio information.
To prevent your AVR80
from obsoles-
II
cence, special jacks are provided for use
with external multichannel audio
adapters.
If an adapter such as the Harman
Kardon ADP303 is installed in your sys-
tem, connect its six analog audio outputs
to the
6-CH DIRECT INPUT
on the AVR80
's rear panel.
II
When listening to programs using an
external adapter, press the
6-CH
button
zÔ
on the remote or
DIRECT
front panel. All surround processing will
be disabled when 6 Channel Direct is in
use, as none is required with discrete
audio signals. Volume is controlled in the
normal fashion.
NOTE: Audio reproduced from the
6 Channel Direct inputs may not be
recorded.
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