Conﬁguring speakers and audio – ROTEL RSP-1570 User Manual

Page 41

English

RSP-1570 Surround Sound Processor

English

RSP-1570 Surround Sound Processor

Select CINEMA to optimize for Dolby Surround encoded movie
soundtracks including increased surround separation and full-bandwidth
surround channel frequency response.

Select MUSIC to optimize for musical recordings. When the MUSIC
mode is selected, three additional parameters will be available on the
OSD screen. Use the UP/DOWN buttons on the remote to select a
parameter. Use the +/– buttons to change the selected parameter as
follows:

• PANORAMA: The Panorama option extends the front stereo image

to include the surround speakers for a dramatic “wraparound” effect.
The options are OFF or ON.

• DIMENSION: The Dimension option allows you to gradually adjust

the soundﬁeld towards the front or towards the rear. There are seven
incremental settings from 0 to 6. A setting of 0 shifts the soundﬁeld
towards the rear for maximum surround effect. A setting of 6 shifts
the soundﬁeld to the front for minimum surround effect. The default
setting of 3 provides a “neutral” balance between the two extremes.

• CENTER WIDTH: The Center Width option allows you to spread

the signal intended for the center speaker to the left and right
front speakers, widening the perceived soundﬁeld. There are eight
incremental settings from 0 to 7. With the default setting of 3, there is
no center width spreading and all of the center channel information
is sent to the center speaker. The maximum setting of 7 shifts all of the
center channel signal to the left and right speakers, essentially muting
the center speaker and maximizing the soundﬁeld width. Other
settings provide incremental steps between the two extremes.

Select GAME to optimize for Dolby Surround encoded video games.

Select PRO LOGIC for original Dolby Pro Logic decoding. Typically,
Pro Logic II (Cinema or Music modes) will provide better surround
performance, even with older source material. Original Pro Logic mode
provides 5.1 channel surround sound, even on 6.1/7.1 channel systems.

When you have completed all the desired adjustments, highlight the
INPUT SETUP MENU line at the bottom of the screen and press the
ENTER button to return to the INPUT SETUP menu (or just press the
ENTER button).

DTS Neo:6

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When DTS Neo:6 is selected as the default surround mode on the
INPUT SETUP menu, there are additional option settings and parameters
available to optimize the surround decoding for various types of
recordings, music or movie soundtracks. DTS Neo:6 uses matrix
decoding algorithms to derive a center channel and surround channels
from 2-channel source material.

In DTS Neo:6 mode, there will only be one choice available on the sub-
menu: selecting CINEMA or MUSIC modes. Use the +/– buttons on the
remote to change the settings.

• Select CINEMA to optimize the DTS Neo:6 decoding for movie

soundtracks.

• Select MUSIC to optimize the DTS Neo:6 decoding for musical

recordings.

When you have completed the setting, highlight the INPUT SETUP MENU
line at the bottom of the screen and press the ENTER button to return to
the INPUT SETUP menu (or just press the ENTER button).

Conﬁguring
Speakers and Audio

This section of the setup process covers items concerning audio
reproduction such as the number of speakers, bass management
including subwoofer crossovers, establishing equal output levels for all
channels, delay settings, and tone contour settings.

Understanding Speaker Conﬁguration

Home theater systems vary in the number of speakers and the bass
capabilities of those speakers. This processor offers surround modes
tailored to systems with various numbers of speakers and bass
management features which send bass information to the speaker(s)
best able to handle it – subwoofers and/or large speakers. For optimum
performance, you must tell the processor the number of speakers in your
system and how bass should be distributed among them.

Note: There are two types of bass in a surround system. The ﬁrst

is bass recorded in each of the main channels (front, center, and

surround). This bass is present in all recordings and soundtracks.

In addition, Dolby Digital 5.1 and DTS 5.1 recordings may have

a Low Frequency Effects (LFE) channel – the .1 channel. This LFE

channel, typically played by a subwoofer, is used for effects such

as explosions or rumble. The use of the LFE channel will vary from

soundtrack to soundtrack. Recordings that are not encoded in

Dolby Digital or DTS do not have the LFE channel.

The following conﬁguration instructions refer to LARGE and SMALL
speakers, referring more to their desired bass conﬁguration than their
physical size. Speciﬁcally, use the LARGE setting for speakers that you
want to play deep bass signals. Use the SMALL designation for speakers
that would beneﬁt from having their bass sent to more capable speakers.
The bass management system redirects bass information away from
all SMALL speakers and sends it to the LARGE speakers and/or the
SUBWOOFER. It may be useful to think of LARGE as “full-range” and
SMALL as “high-pass ﬁltered.”

Four typical examples of the many possible system conﬁgurations
illustrate the principles behind bass management:

• Five LARGE speakers and subwoofer: This system requires no

bass redirection. All ﬁve speakers play the normal bass recorded in
their respective channels. The subwoofer plays only the LFE channel
bass. Depending on the soundtrack, there may be minimal use of the
LFE channel, so the subwoofer would be under utilized. Meanwhile

the normal bass places higher demands on the capabilities of the
other speakers and the ampliﬁers driving them.

• LARGE front, center, surround speakers, no subwoofer.

The normal bass from the front, center, and surround channels is
played in its respective speakers. With no subwoofer, the LFE bass is
redirected to all ﬁve LARGE speakers. This places signiﬁcant demands
on these speakers and their ampliﬁers, as they must play their own
normal bass plus the very demanding LFE bass.

• All SMALL speakers and subwoofer. The normal bass from all

channels is redirected to the subwoofer, which also plays the LFE
channel. The subwoofer handles ALL of the bass in the system. This
conﬁguration provides several beneﬁts: deep bass is played by the
speaker most suited to do so, the main speakers may play louder
with less distortion, and the need for ampliﬁer power is reduced.
This conﬁguration should be used with bookshelf-size or smaller
main speakers. It should also be considered in some cases with
ﬂoorstanding front speakers. This conﬁguration is advantageous
when driving the system with moderate power ampliﬁers.

• LARGE front speakers, SMALL center and surround speakers,

and a subwoofer.

The normal bass from the SMALL center and

surround speakers is redirected to the LARGE front speakers and the
subwoofer. The LARGE front speakers play their own normal bass
plus the redirected bass from the SMALL speakers and LFE bass.
The subwoofer plays the LFE bass plus the redirected bass from all
of the other channels. This might be an appropriate conﬁguration
with a pair of very capable front speakers driven by a large power
ampliﬁer. A potential disadvantage with mixed LARGE and SMALL
conﬁgurations is that the bass response may not be as consistent from
channel to channel as it might be with the all SMALL conﬁguration.

Note: As an alternative conﬁguration with a satellite/subwoofer

package as the front speakers, follow the speaker manufacturer’s

instructions, connecting the high-level inputs of the powered

subwoofer directly to the front speaker outputs of your ampliﬁer

and connecting the satellites to the subwoofer’s own crossover.

In this arrangement, the speakers would be classiﬁed as LARGE

and the subwoofer setting would be OFF for all surround modes.

No information is lost during playback because the system

redirects bass information to the front LARGE speakers. While this

conﬁguration ensures proper satellite speaker operation by using

the speaker’s own crossovers, it has some disadvantages in terms

of system calibration and would generally not be the preferred

conﬁguration.

Speaker Setup

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The SPEAKER SETUP menu is used to conﬁgure the RSP-1570 for use
with your speciﬁc loudspeakers and to determine the bass management
conﬁguration as described in the previous overview. The menu is
accessed from the MAIN menu.

The following speaker options are available:

FRONT SPEAKERS (small/large):

Use the LARGE setting to have

the front speakers play low bass (full-range). Use the SMALL setting to
redirect normal bass away from these speakers to a subwoofer (high-
pass ﬁltered).

CENTER SPEAKER(S) (large/small/none):

Use the LARGE position

(not available with SMALL front speakers) to have the center speaker
play low bass (full-range). Use the SMALL position if your center channel
speaker has limited low frequency capability, or if you prefer that the
bass be sent to the subwoofer (high-pass). Select the NONE setting if
your system does not have a center channel speaker (the surround modes
will automatically divide all center channel information equally between
the two front speakers, creating a phantom center channel).

SURROUND SPEAKERS (large/small/none):

Select the LARGE

setting (not available with SMALL front speakers) to have the surround
speakers play low bass (full-range). If your rear speakers have limited
bass capability or if you would prefer that the bass go to a subwoofer,
use the SMALL setting (high-pass). If your system has no rear surround
speakers, select the NONE setting (surround channels are added to the
front speakers so none of the recording is lost).

CENTER BACK SPEAKER(S) (large1/large2/small1/small2/
none):

Some systems have one or two additional center back surround

speakers. Select the LARGE settings (not available with SMALL front
speakers) to have your center back speaker(s) play low bass. Use
LARGE 1 if you have one center back speaker (6.1) or LARGE 2 (7.1) if
you have two center back speakers (7.1). If your center back speakers
have limited bass capability or if you would prefer that the bass go to
a subwoofer, use the SMALL setting (SMALL1 for one speaker, SMALL2
for two speakers). If your system has no center back speakers, select
the NONE setting. With center back speakers, the Rotel XS eXtended
surround, Dolby Digital EX, DTS-ES, Dolby Pro Logic II, DTS Neo:6 or
other decoders will provide center back signals for any surround mode.

SUBWOOFER (yes/no/max):

The YES setting is the standard setting if

your system has a subwoofer. If your system does not have a subwoofer,
select NO. Select the MAX setting for maximum bass output with normal
bass being duplicated by both the subwoofer and any LARGE speakers
in the system.

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