OPERATION 47
ENGLISH
Dolby Digital
Dolby Digital 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 AVR to listen to the Dolby
Digital sound tracks available on laser discs.
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 AVR. No demodulator
is required for use with DVD players or DTS-
encoded laser discs.
In order to provide maximum playback compati-
bility with DVDs, the AVR 745 receiver will
always default first to the playback mode embed-
ded in a disc’s digital “flag” information. For
Dolby Digital discs, the following playback modes
are initially selected after the AVR locks to the
incoming digital audio data stream to identify
the selected:
• When a 5.1 audio stream is detected, the
Dolby Digital 5.1 format will be selected,
regardless of the number of speakers in your
system, in compliance with Dolby Laboratories
licensing requirements.
• When a disc with the Dolby Digital EX format
flag is played, your system will automatically
switch to the EX mode when seven main chan-
nel speakers are available.
• When a disc with Dolby Digital data, 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 speaker system, or Dolby
Digital with Pro Logic IIx post-processing when
you have a 7.1 speaker system.
• Depending on the number of speaker channels
available in your system, once the AVR locks to
the digital signal, you may select any surround
mode or post-processing option that is avail-
able, based on the incoming data stream’s pos-
sible restrictions and the number of speakers in
your system. For example, 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 speaker systems.
DTS
DTS is another digital audio system that is capa-
ble 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 available on select
DVD and LD discs, as well as on special audio-
only DTS CDs. You may use any LD, DVD or CD
player equipped with a digital output to play
DTS-encoded special audio-only CDs with the
AVR, 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’s digital output
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’s front panel. Note that early DVD
players may not be able to play DTS- encoded
DVDs. This does not indicate a problem with the
AVR, 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’s owner’s manual.
When the AVR 745 is connected to a blue-laser-
based high-definition optical disc player via an
HDMI, coaxial or optical digital connection, the
soundtrack from the player is also available in
the standard DTS format so that it may be
decoded by the AVR.
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 AVR,
please check the setup menu system on your
DVD player to make certain that DTS data output
is enabled.
PCM Audio Playback
PCM (Pulse Code Modulation) is the non- com-
pressed digital audio system used for compact
discs, Non-Dolby Digital/DTS Laserdiscs and some
special PCM encoded DVDs. The digital circuits in
the AVR are capable of high quality 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
.
To listen to a PCM digital source, first select the
input for the desired source (e.g., CD) to feed its
video signal (if any) to the TV monitor and to
provide its analog audio signal for recording.
Next press the Digital Select button
Û
and
then use the
⁄
/
¤
buttons
D
F 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
E
Q to confirm the choice.
In most cases this will be
48KHZ, though in
the case of specially mastered, high-resolution
audio discs you will see a
96KHZindication.
The
PCM48KHZindication 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 VCR, tape
deck, the tuner, or other ana-log source to
digital.
During PCM playback the unit automatically will
turn to the default surround mode or to the
LOGIC7 mode but you also may select any
surround mode except Dolby Digital or DTS.
Selecting a Digital Source
To utilize either digital mode you must have
properly connected a digital source to the AVR.
Connect the digital outputs from DVD players,
HDTV receivers, satellite systems or CD players to
the Optical or Coaxial inputs on the rear or
front panel
UV*Ó
. In order to provide a
backup signal and a source for analog stereo
recording, the analog outputs provided on digital
source equipment should also be connected to
their appropriate inputs on the AVR rear panel
(e.g., connect the analog stereo audio output
from a DVD to the DVD Audio inputs
5
on
the rear panel when you connect the source’s
digital outputs).
If you have not already configured an input for a
digital source using the on-screen menus, as
shown on page 23, first select the input using
the remote or front-panel controls, as outlined in
this manual. Next, press the Devices Button
4
, followed by the Screen Button
6
at the
top of the row of buttons on the left side of the
TC 30, to the left of the A/V receiver image on
the LCD screen.After the list of options displayed
in the LCD Screen
7
changes, press the
Screen Button
6
to the left of SETUP
MENU
.After the options change, press the
Screen Button
6
to the right of
DIGITAL INPUTand then press the
‹
/
›
Navigation Buttons
D
F on the TC 30
remote or the
‹
/
›
Navigation Button
7$
on the front panel to choose any of the
OPTICALor COAXIAL inputs, as they
appear in the Upper Display Line
˜
or on-
screen display. When the digital source is playing,
the AVR 745 will automatically detect which type
of digital data stream is being decoded and
display that information in the Upper Display
Line
˜
.
When both a digital and an analog connection
are made between a source device and the AVR,
the digital input is the default. If the digital
stream is not present or is interrupted, the unit
will automatically switch over to the analog
inputs for the selected source.
Operation
