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OPERATION

Operation

These indicators are the L/C/R/LFE/SL/SR/SBL/SBR
letters that are inside the center boxes of the

Speaker/Channel Input Indicators

in the

front panel

Main Information Display

When a standard analog stereo or matrix
surround signal is in use, only the “L” and “R”
indicators will light, as analog signals have only
left and right channels.

Digital signals, however, may have one, two, five,
six or seven separate 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 letters 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
audio tracks selected on DVD or other Dolby
Digital programs are encoded for 5.1. 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 soundtrack 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 5550 or to select the appropriate
audio track and thus language. It is also possible
for the type of signal feed to change during the
course of a DVD playback. In some cases the pre-
views of special material 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 5550 will automati-
cally sense changes to the bitstream and channel
count and reflect them in these indicators.

Important Note:

When a digital surround

source (Dolby Digital, DTS) is played, the letters
SBL/SBR for the Surround Back channels will
appear only when a DTS ES DISCRETE 6.1 source
is played. Then this surround mode will be
indicated in the front display and on-screen
display. With all other recordings the icons for the
surround back speakers may light (when those
speakers have been configured) to indicate that a
signal will be fed to them (Matrix decoded with
NEO:6, LOGIC 7 or 7 CH Stereo), but no letters
inside will light as the unit will not receive an
input signal for the surround back channels.

The letters used by the

Speaker/Channel Input

Indicators

also flash to indicate when a bit-

stream 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 put into a Pause mode. 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 5550. 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 digital intelligibilty
while reducing the maximum peak level and lift-
ing the low levels by

. This prevents

abruptly loud transitions from disturbing others
without reducing the impact of the digital source.
The Night mode is available only when the Dolby
Digital mode is selected.

The Night mode may be engaged when a Dolby
Digital DVD is playing by pressing the

Night

Button

on the remote. Next, press the

⁄

buttons

to select either the middle range or

full compression versions of the Night mode. To
turn the Night mode off, press the

⁄

buttons

until the message in the lower third of the

video display and the

Lower Display Line

reads

D-RANGE OFF

The Night mode may also be selected to always
be on as soon as the Dolby Digital mode is
activated at either level of compression using the
options in the

Surround Select

menu. See page 25 for information on using the
menus to set this option.

IMPORTANT NOTES ON DIGITAL PLAYBACK:

• 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 Indicators

will flash. This is normal

and does not indicate a problem with either the
AVR 5550 or the source machine. The AVR 5550
will return to digital playback as soon as the data
is available and when the machine is in a
standard play mode.

• Although the AVR 5550 will decode virtually all
DVD movies, CDs and HDTV sources, it is possible
that some future digital sources may not be com-
patible with the AVR 5550.

• Note that not all digitally encoded programs
and not all audio tracks on a DVD contain full
5.1 or 6.1 channel audio. Consult the program
guide that accompanies the DVD or laser disc to
determine which type of audio has been record-
ed on the disc. The AVR 5550 will automatically
sense the type of digital surround encoding used,
indicate it in the

Channel Input Indicators

and adjust to accommodate it.

• When a Dolby Digital or DTS source is playing,
you normally may not be able to select some of
the analog surround modes such as Dolby Pro
Logic II, Dolby 3 Stereo, Hall, Theater, 5CH/7CH
Stereo or Logic 7, except with specific Dolby

Digital 2.0 recordings that can be played with
the Pro Logic II modes too (see page 34).

• When a digital source is playing, it is possible
to make an analog recording using the

Tape

Video 1

Video 2

record outputs,

even if the source is connected to any digital
input of the AVR 5550 only, as long as "Surround
Off" mode is selected (possible with a PCM
source only). But the analog two channel signal,
even of a Dolby Digital (not DTS) source, the
”Downmix” to Stereo or Dolby Surround, can be
recorded by connecting its analog audio outputs
to the appropriate analog inputs (e.g. DVD) of
the AVR 5550. Additionally, the digital signals
will be passed through to the

Digital Audio

Outputs

Tape Recording

In normal operation, the audio or video source
selected for listening through the AVR 5550 is
sent to the record outputs. This means that any
program you are watching or listening to may be
recorded simply by placing machines connected
to the outputs for

Tape Outputs

Video 1

2 Outputs

in the record mode.

When a digital audio recorder is connected to
any of the

Digital Audio Outputs

, you are

able to record the digital signal using a CD-R,
MiniDisc or other digital recording system.
Note that all digital signals will be passed
through to both, coaxial and optical, digital
outputs simultanously, no matter which kind of
digital input was selected.

Front Panel In/Outputs

In addition to the rear panel digital outputs, the
AVR 5550 offers Harman Kardon’s exclusive con-
figurable front panel output jack feature. For easy
connection of portable devices, you may switch
the front panel

Digital Coax 3 jack

or the

Video 4

jack

from an input to an output by

following these steps:

1. Press the

OSD

button

to view the

M A S T E R M E N U

(Figure 1).