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OPERATION
26 OPERATION
• For private listening, plug the 1/4" stereo phone
plug from a pair of stereo headphones into the
front-panel Headphone Jack
4
. When the
headphone plug is connected, all speakers will be
silenced and DOLBY H:BP will scroll once
across the Lower Display Line ¯ , indicating that
the headphone output is in the Bypass mode, and
to confirm that no processing is being used. When
the headphone plug is removed, the audio feed
to the speakers will be restored.
• When the headphones are in use, you may take
advantage of the Dolby Headphone modes to bring
added spaciousness to headphone listening. Press
the Dolby Mode Select Button w or the
Surround Mode Group Selector 7 to cycle
through the three Dolby Headphone modes and
select the one that you prefer.
Surround Mode Selection
One of the most important features of the AVR 235
is its ability to reproduce a full multichannel surround
sound field from digital sources, analog matrix
surround-encoded programs and standard
stereo programs.
Selection of a surround mode is based on personal
taste, as well as the type of program source material
being used. For example, motion pictures or TV
programs bearing the logo of one of the major sur-
round-encoding processes, such as Dolby Surround or
DTS Stereo, may be played in either the Dolby Digital,
Dolby Pro Logic II Cinema, Dolby Pro Logic IIx Cinema,
DTS Neo:6 Cinema or Logic 7 Cinema surround
modes, depending on the source material.
NOTE: Once a program has been encoded with matrix
surround information, it retains the surround information
as long as the program is broadcast in stereo. Thus,
movies with surround sound may be decoded via any of
the analog surround modes such as Dolby Pro Logic II
Movie, 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 growing
number of made-for-television programs, sports broad-
casts, radio dramas and music CDs are also recorded in
surround sound.
Even when a program is not listed as carrying inten-
tional surround information, you may find that the Dolby
Pro Logic II, Logic 7 Enhanced or DTS Neo:6, VMAx
and the Hall or Theater modes often deliver enveloping
surround presentations through the use of the natural
information present in all stereo recordings.
Surround modes may be changed at any time by
using either the front panel or remote control. To
select a new surround mode from the front panel, first
press the Surround Mode Group Selector Button
7 until the desired major surround mode group such
as Dolby, DTS or Logic 7 is selected. Next, press the
Surround Mode Selector Button 8 to choose the
specific individual surround mode.
To select a surround mode using the remote, press
the button for the major surround mode group that
includes the mode you wish to choose from: Dolby
w, DTS Surround x, DTS Neo:6 , Logic 7
y, Stereo or DSP Surround k. The first
press of the button will show the current mode from
that group if it is already in use, or the first available
mode if you are currently using another mode. To cycle
through the available modes in that group, press the
button again until the desired mode appears in the
Lower Display Line ¯, in the on-screen display and
in the Surround Mode Indicators ˘.
As the surround modes change, the appropriate
Surround Mode Indicator
˘ will light to indicate
which mode has been selected.
The Dolby Digital, Dolby Digital EX and DTS 5.1,
DTS-ES Matrix and DTS-ES Discrete modes may only
be selected when a digital input is in use. In addition,
when a digital source is present, the AVR 235 will
automatically select and switch to the correct mode,
regardless of the mode that has been previously
selected. For more information on selecting digital
sources, see the Digital Audio Playback section below.
The Dolby Pro Logic IIx modes are available only
when the AVR 235 has been configured for 6.1/7.1
operation by configuring the Surround Back speakers
as either “Large” or “Small” as described on page 21.
These modes provide a matrixed 6.1-channel presen-
tation of analog sources. See page 27 for more infor-
mation.
When the 6-channel/8-channel direct inputs are in
use there is no surround processing, as these inputs
take the analog output signals from an optional, exter-
nal DVD-Audio or SACD player, or another source
device and carry them straight through to the volume
control without any further digital processing.
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 SURR OFF appears in the
Lower Display Line ¯, or press the Surround Mode
Group Selector 7 until the Stereo
modes appear in
the on-screen display and Lower Display Line ¯.
Next, press the Surround Mode Select Button 8
until SURROUND OFF appears in the on-screen
display and Lower Display Line ¯. The Surround
Off mode provides an analog bypass of the digital pro-
cessing, including bass management. Scroll until
SURROUND OFF DSP appears if you require
bass management (usually used when the system
includes a separate subwoofer).
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 as of this writing) discrete channels:
left front, center, right front, left surround and right sur-
round (or back surround, if it is a 6.1-channel format).
Each channel reproduces full frequency range (20Hz to
20kHz) and offers dramatically improved dynamic range
and significant improvements to signal-to-noise ratios. In
addition, digital systems have the capability to deliver an
additional channel that is specifically devoted to low-fre-
quency 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 is a standard part of DVD, and is avail-
able on specially encoded LD discs and satellite broad-
casts and it is a part of the high-definition television
(HDTV) system.
An optional, external RF demodulator is required to
use the AVR 235 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 *(ad of the AVR 235. No
demodulator is required for use with DVD players or
DTS-encoded laser discs.
DTS
DTS is another digital audio system that is capable of
delivering 5.1 or 6.1 discrete or matrix sound field
reproduction. Although both DTS and Dolby Digital are
digital, they use different methods of encoding the sig-
nals, and thus they require different decoding circuits
to convert the digital signals back to analog.
DTS-encoded soundtracks are available on select DVD
and LD discs, as well as on special audio-only DTS
discs. You may use any LD or CD player equipped
with a digital output to play DTS-encoded discs with
the AVR 235. All that is required is to connect the
player’s output to either an Optical or Coaxial Input
on the rear panel ad or front panel *(.
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. Early DVD players may not be able to play
DTS-encoded DVDs. This does not indicate a problem
28
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(Continued on p. 28)
AVR 235 OM 8/30/04 9:18 AM Page 26
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