42 OPERATION
Operation
Note that the Dolby Digital or DTS modes may
only be selected when a digital input is in use In
addition, when a digital source is present, the
A
correct mode (Dolby Digital or DTS), regardless of
the mode that has been previously selected. F
more information on selecting digital sources see
the following section of this manual.
When the 6-Channel/8-Channel direct inputs are
in use there is no surround processing, as these
inputs tak
optional, external DVD-Audio or SACD player or
another source device and carry them straight
through to the volume control.
T
stereo using the front left and front right
speak
configured), press the Stereo Button
5
S
until SURR OFF
appears in the Main
Information Display ˜.
Digital Audio
Digital audio is a major advancement over older
analog surround processing systems such as
Dolby Pro Logic. It delivers five or six discrete
channels: left front, center left sur-
round and right surround and with DTS ES (see
below) even surround back (with identical signals
for left and right). Each channel reproduces full
frequency range (20Hz to 20kHz) and offers dr
matically improved dynamic range and significant
improvements to signal-to-noise ratios In addi-
tion, digital systems have the capability to deliver
an additional channel that is specifically devoted
to low-frequency information. This is the
channel referred to when you see these systems
described “6.1” or “7.1”. T
channel is separate from the other channels but
since it is intentionally bandwidth-limited, sound
designers have given it that unique designation.
Dolby Digital
Dolby Digital (originally known as
®
) is a
standard part of DVD and is available on
specially encoded LD discs and satellite
broadcasts and it is a part of the new high-
definition television (HDTV) system.
Note that an optional, external RF demodulator
is required to use the
Digital sound tracks av
Connect the RF output of the LD player to the
demodulator and then connect the digital output
of the demodulator to the Optical or Coaxial
inputs
UV*Ó
of the No demodulator
is required for use with DVD players or DTS-
encoded laser discs
In order to provide maximum playback
compatibility with DVDs the
will always default first to the playback mode
embedded in a disc’ information.
F the following playback
modes are initially selected after the
the incoming digital audio data stream to
identify the selected:
• the
Dolby Digital 5.1 format will be selected,
regardless of the number of speak
system, in compliance with Dolby Laboratories
licensing requirements
•
flag is played, your system will automatically
switch to the EX mode when seven main
channel speak
• but only
2.0 audio is detected, the default mode is
Dolby Digital with Pro Logic II post-processing
when you have a 5.1 speak or Dolby
Digital with Pro Logic IIx post-processing when
you have a 7.1 speak
• Depending on the number of speak
available in your system, once the
the digital signal, you may select any surround
mode or post-processing option that is
available based on the incoming data stream’
possible restrictions and the number of speak-
ers in your system. F when a 5.1 or
2.0 audio stream is in use you may select
alternate postprocessing such as Logic 7/7-
Channel Movie Mode post-processing to create
the rear surrounds in 7.1 speak
DTS
DTS is another digital audio system that is
capable of delivering 5.1, 6.1 or 7.1 audio
Although both DTS and Dolby Digital are digital,
they use different methods of encoding the
signals and thus they require different decoding
circuits to convert the digital signals back to
analog.
DTS-encoded sound tracks are av
DVD and LD discs as well as on special audio-
only DTS CDs Y DVD or CD
player equipped with a digital output to play
DTS-encoded special audio-only CDs with the
A but DTS-LDs can be played on LD players
and DTS-DVDs on DVD players only All that is
required is to connect the player’
to either the Optical or Coaxial input on the
rear panel
UV
or front panel
*Ó
.
In order to listen to DVDs encoded with DTS
sound tracks the DVD player must be compatible
with the DTS signal as indicated by a DTS logo
on the player’ Note that early DVD
players may not be able to play DTS- encoded
DVDs This does not indicate a problem with the
A as some players cannot pass the DTS signal
through to the digital outputs If you are in doubt
as to the capability of your DVD player to handle
DTS DVDs consult the player’
Please note that some DVD players are shipped
with their output set for Dolby Digital only To
insure that DTS data is being sent to the
please check the setup menu system on your
DVD player to mak
is enabled.
PCM Audio
PCM (Pulse Code Modulation) is the non-
compressed digital audio system used for
compact discs Non-Dolby Digital/DTS Laserdiscs
and some special PCM encoded DVDs The digital
circuits in the
digital-to-analog decoding, and they may be
connected directly to the digital audio output of
your CD/DVD or LD player (LD only for PCM or
DTS programs for Dolby Digital laser discs an RF
adapter is needed, see ”Dolby Digital” above).
Connections may be made to either the Optical
or Coaxial inputs
UV
on the rear panel or the
front panel Digital Inputs
*Ó
.
T first select the
input for the desired source (e CD) to feed its
video signal (if any) to the
provide its analog audio signal for recording.
Next press the Digital Select button
Û
G
and then use the
⁄
/
¤
buttons
E
on the
remote or the Selector buttons
7$
on the
front panel, until the desired choice appears in the
Lower Display Line
˜
, then press the Set
button
@
F
to confirm the choice
In most cases this will be
4 KHZ, though in
the case of specially mastered, high-resolution
audio discs you will see a
9 KHZ indication.
T
PCM 4 KHZ indication will also appear
when modes or inputs are changed for analog
sources In those cases the system is telling you
the sampling frequency used internally at the
output of the analog-to-digital converters that
change the incoming signal from a tape
deck, the tuner
digital.
During PCM playback the unit automatically will
turn to the default surround mode or to the
LOGIC 7 mode but you also may select any
surround mode except Dolby Digital or DTS
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