32
OPERATION
Operation
Surround Mode Selection
One of the most important features of the
AVR 7500 is its ability to reproduce a full multi-
channel surround sound field from digital
sources, analog matrix surround encoded pro-
grams and standard stereo or even mono pro-
grams. In all, a total of 22 listening modes are
available on the AVR 7500.
Selection of a surround mode is based on personal
taste, as well as the type of program source mate-
rial being used. For example, CDs, motion pictures
or TV programs bearing the logo of one of the
major surround-encoding processes, such as Dolby
Surround should be played in either the Dolby Pro
Logic II Movie (with movies) or Music (with
music) surround mode, with any DTS NEO:6
mode or with Harman Kardon´s exclusive Logic 7
Movie Mode, to create a full range 5.1 channel
or (with Logic 7 and DTS NEO:6) even 7.1 chan-
nel surround signal from surround encoded pro-
grams, with a stereophonic left and right rear sig-
nal, just as it was recorded (e.g. sound being
recorded from left rear side will be heard from
that side only, for more details see chart on page
29).
When no rear speakers are in use, the Dolby 3
Stereo mode should be selected with all sur-
round recordings.
Note that when Dolby Digital 2.0 signals (e.g.
"D.D. 2.0" tracks from DVD), that are encoded
with Dolby Pro Logic information, are received
via any digital input, the Dolby Pro Logic II Movie
mode will be selected automatically (in addition
to the Dolby Digital mode) and will decode a full
range 5.1 channel surround sound even from
those recordings (see also "Dolby Digital" on
page 34).
To create wide, enveloping sound field environ-
ments and defined pans and flyovers with all
analog stereo recordings select the Dolby Pro
Logic II Music or Emulation mode or Harman
Kardon’s exclusive Logic 7 Music mode for a dra-
matic improvement in comparison to the Dolby
Pro Logic (I) mode of former times.
NOTE:
Once a program has been encoded with
matrix surround information, it retains the sur-
round information as long as the program is
broadcast in stereo. Thus, movies with surround
sound may be decoded via any of the analog sur-
round modes such as Pro Logic II Cinema, Logic 7
Cinema or DTS Neo:6 Cinema, when they are
broadcast via conventional TV stations, cable, pay-
TV and satellite transmission. In addition, a grow-
ing number of made-for-television programs,
sports broadcasts, radio dramas and music CDs
are also recorded in surround sound. You may
view a list of these programs at the Dolby
Laboratories Web site at www.dolby.com.
Even when a program is not listed as carrying
intentional surround information, you may find
that the Dolby Pro Logic II Music, DTS NEO:6
Music or Logic 7 Music or Enhanced modes often
deliver enveloping surround presentations through
the use of the natural surround information pres-
ent in all stereo recordings.
However, for stereo programs without any sur-
round information the Theater, Hall and 5/7CH
Stereo modes should be tried (effective particularly
with old ”extreme” stereo recordings) and for
mono programs, we suggest that you try the
Theater or Hall modes. And when you use only
two front channel speakers you should select
Harman’s patented VMAx mode, delivering a virtu-
ally three dimensional sound space with two
speakers only.
Surround modes are selected using either the
front panel controls or the remote. First deter-
mine which of the surround mode categories you
wish to choose from and press the button corre-
sponding to that category:
Dolby
modes
5
M
or
DTS Surround
6
N
from digital sources,
DTS Neo:6
&
M
from analog sources,
Logic
7
7y
,
DSP
9
A
modes or
Stereo
$
.
As you press any of the
Mode Select Buttons
(except the
Surround Mode Selector
9
A
as noted below) the surround mode name will
scroll across the
Main Information Display
Y
. Let the mode scroll so that you read the
mode’s name, but if you wish to select another
mode in that category, press the button again
before the mode name scrolls off to the left of the
Main Information Display
Y
or on-screen
display.
To select from the DSP modes (Hall 1, Hall 2,
Theater, VMAx Near or VMAx Far) press the
Surround Mode Selector
9
A
repeatedly to
scroll through the list of available modes.
An individual mode indicator will also light up
DEGIJKLMN
. As the surround
modes change, a green LED will light next to the
current mode in the
Surround Mode
Indicators
˘
list on the front panel.
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
AVR 7500 will automatically select and switch to
the correct mode (Dolby Digital or DTS), regard-
less of the mode that has been previously select-
ed. For more information on selecting digital
sources, see the following section of this manual.
To listen to a program in traditional two-channel
stereo, using the front left and front right
speakers only (plus the subwoofer, if installed and
configured), press the
Stereo Button
$
until
S U R R O F F
appears in the
Main
Information Display
Y
.
Digital Audio Playback
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, right front, left surround and right
surround and with DTS ES (see below) even sur-
round back (with identical signals for left and
right). Each channel reproduces full frequency
range (20Hz to 20kHz) and offers dramatically
improved dynamic range and significant improve-
ments to signal-to-noise ratios. In addition, digital
systems have the capability to deliver an additional
channel that is specifically devoted to low-frequen-
cy information. This is the “.1” channel referred to
when you see these systems described as “5.1,”
“6.1” or “7.1”. The bass 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 AC-3
®
) 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 7500 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
*Ó
of the AVR 7500.
No demodulator is required for use with DVD
players or DTS-encoded laser discs.
