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24 OPERATION
OPERATION
Digital Status Indicators
When a digital source is playing, the AVR 125 senses
the type of bitstream data that is present. Using this
information, the correct surround mode will automati-
cally be selected. For example, DTS bitstreams will
cause the unit to switch to DTS decoding, and Dolby
Digital bitstreams will enable Dolby Digital decoding.
When the unit senses PCM data from CDs or LDs, you
may select any of the standard surround modes, such
as Dolby Pro Logic II or Logic 7. Since the range of
available surround modes is dependent on the type of
digital data that is present, the AVR 125 uses a variety
of indicators to let you know what type of signal is
present. This will help you to understand the choice
of modes.
When a digital source is playing, a
Bitstream
Indicator
A will light to show which type of signal is
playing:
D: When the DOLBY D indicator lights, a Dolby
Digital bitstream is being received. Depending on the
settings on the source player and specific surround
information and number of channels on the disc, a
number of surround modes are possible. For discs
with full 5.1 audio, only the Dolby Digital and VMAx
modes are available. When the Dolby Digital signal is
only two-channel, you may also select from the Logic 7
Cinema/Music, Hall 1/2, Theater, Dolby Pro Logic II
Movies, Music or Emulation, or Dolby 3 Stereo modes.
When the AVR 125 senses a 2.0-channel Dolby
Digital signal, the unit will automatically select Dolby
Pro Logic II as the surround processing mode, and
both the
Dolby Digital C and Dolby Pro Logic II
D surround-mode indicators will light in accordance
with the requirements of Dolby Laboratories.
DTS: When the DTS indicator lights, a DTS bitstream
is being received. When the unit senses this type of
data, only the DTS mode may be used.
PCM: When the PCM indicator lights, a standard
Pulse Code Modulation, or PCM, signal is being
received. This is the type of digital audio used by con-
ventional compact disc and laser disc recordings.
When a PCM bitstream is present, all modes except
Dolby Digital and DTS are available.
When a high-resolution, 96kHz/24-bit PCM signal is
detected, the name of the current source input fol-
lowed by
96K, for example, DVD/96K, will be
displayed in the
Main Information Display F. This
type of program material can be found on specially
marked discs that were recorded using a higher sam-
pling rate than the 44kHz or 48kHz typically used on
compact discs. The Stereo-Digital (Surround Off)
mode will be available to process a 96/24 signal. The
Stereo-Analog mode will not be available since, by
definition, a 96/24 signal may be supplied only via a
digital input.
In addition to the bitstream indicators, the AVR 125
features a set of unique channel-input indicators that
tell you how many channels of digital information are
being received and/or whether the digital signal is
interrupted.
These indicators are the L/C/R/SL/SR/LFE letters that
are inside the center boxes of the
Speaker/Channel
Input Indicators
L in the front panel Main
Information Display
Û. When a standard analog
signal is in use, only the “L” and “R” indicators will
light, as analog signals have only left and right chan-
nels, respectively.
Digital signals, however, may have two, five or six sep-
arate channels, depending on the program material,
the method of transmission and the way in which it
was encoded. When a digital signal is playing, the let-
ters in these indicators will light in response to the
specific signal being received. It is important to note
that although Dolby Digital, for example, is referred to
as a “5.1” system, not all Dolby Digital DVDs or pro-
grams are encoded with 5.1 channels. Thus, it is
sometimes normal for a DVD with a Dolby Digital
soundtrack to trigger only the “L” and “R” indicators.
NOTE: Many DVD discs are recorded with both “5.1”
and “2.0” versions of the same sound-track.When
playing a DVD, always be certain to check the type of
material on the disc. Most discs show this information
in the form of a listing or icon on the back of the disc
jacket. When a disc does offer multiple sound track
choices you may have to make some adjustments to
your DVD player (usually with the “Audio Select” button
or in a menu screen on the disc) to send a full 5.1
feed to the AVR 125. It is also possible for the type of
signal feed to change during the course of a DVD
playback. In some cases the previews of special mate-
rial will only be recorded in 2.0 audio, while the main
feature is available in 5.1 audio. As long as your DVD
player is set for 6-channel output, the AVR 125 will
automatically sense changes to the bitstream and
channel count and reflect them in these indicators.
The letters used by the
Speaker/Channel Input
Indicators
L also flash to indicate when a bitstream
has been interrupted. This will happen when a digital
input source is selected before the playback starts, or
when a digital source such as a DVD is paused. The
flashing indicators remind you that the playback has
stopped due to the absence of a digital signal and not
through any fault of the AVR 125. This is normal, and
the digital playback will resume once the playback is
started again.
Night Mode
A special feature of Dolby Digital is the Night mode,
which enables Dolby Digital input sources to be played
back with full dialogue intelligibility while reducing the
minimum peak level by
1
/4 to
1
/3. This prevents
abruptly loud transitions from disturbing others, without
reducing the impact of the digital source. The Night
mode is available only when Dolby Digital signals with
special data are being played.
The Night mode may be engaged when a Dolby
Digital DVD is playing by pressing the
Night Mode
Button
k on the remote. Next, press the
⁄
/
¤
Buttons mq to select either the middle range or
maximum-compression versions of the Night mode. To
turn the Night mode off, press the
⁄
/
¤
Buttons
mq until the message in the Main Information
Display
F reads D-R Off. When the Night
mode is active, the
Night Mode Indicator K will
also light.
IMPORTANT NOTES ON DIGITAL PLAYBACK:
1. When the digital playback source is stopped, or in a
Pause, Fast Forward or Chapter Search mode, the
digital audio data will momentarily stop, and the
channel position letters inside the
Speaker/
Channel Input Indicators
L will flash. This is
normal and does not indicate a problem with either
the AVR 125 or the source machine.The AVR 125
will return to digital playback as soon as the data is
available and when the machine is in a standard
play mode.
2.Although the AVR 125 will decode virtually all DVD
movies, CDs and HDTV sources, it is possible that
some future digital sources may not be compatible
with the AVR 125.
3. Note that not all digitally encoded programs contain
full 5.1-channel audio. Consult the program guide
that accompanies the DVD or laser disc to deter-
mine which type of audio has been recorded on the
disc. The AVR 125 will automatically sense the type
of digital surround encoding used and adjust to
accommodate it.
4. When a digital source is playing, you may not be
able to select some of the analog surround modes
such as Dolby Pro Logic II, Dolby 3 Stereo, Hall,
Theater or Logic 7.
5. When a Dolby Digital or DTS source is playing, it
is not possible to make an analog recording using
the
Tape ¢ and Video 1 Audio Outputs .
However, the digital signals will be passed through
to the
Optical fi and Coaxial fl Digital Audio
Outputs
.
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