ROTEL RSP985 - Handbuch (Seite 12)

12 RSP-985 Surround Sound Processor
Surround Sound Mode LEDs
The RSP-985 provides numerous surround
sound modes to accommodate different types
of audio and video source material as de-
scribed below. These LEDs indicate which
surround sound mode you’ve selected. Here
is a brief description of the various surround
sound modes.
2 CH STEREO provides conventional 2-
speaker stereo with no surround sound or other
processing. The front left and right speakers
are on. The center and surround speakers are
off.
MONO combines all channels from the source
input into a single signal. The signal is sent to
the center channel speaker. If there is no cen-
ter channel speaker in your system, the sig-
nal is sent equally to the front left and right
speakers. All other speakers (except the
subwoofer) are off. This setting might be suit-
able for some TV watching, for example if you
have the news report on in the background
and do not want the volume levels or effects
of the full surround system.
MUSIC 1, MUSIC 2, MUSIC 3, and
MUSIC 4 simulate different acoustic environ-
ments and are primarily used to recreate am-
bience when listening to music sources. MU-
SIC 1 (“Hall”) produces the long, bright echo
of a large auditorium, suitable for live record-
ings. MUSIC 2 (“Club”) provides the short, dark
echo of a crowded club, suitable for pop and
rock. MUSIC 3 (“Natural”) provides minimal
ambience suitable for a wide range of music
including jazz, acoustic, and surround encoded
music. MUSIC 4 (“Party”) sends the full ste-
reo signal with no surround processing to front
and rear speakers for maximum output. Ex-
periment to determine which mode best
matches your chosen source. All speakers are
on in all MUSIC modes.
NOTE : A single LED is used to indicate both
the MUSIC 1 and 2 modes while a second
LED indicates both MUSIC 3 and 4.
NOTE
: The subwoofer is normally not active in
MUSIC modes, if LARGE front speakers are
selected (although, this setting can be over-
ridden to make the subwoofer active during
system configuration).
DOLBY PRO LOGIC ® provides proper play-
back decoding and processing for any Dolby
Surround encoded analog audio source,
whether it be a music CD, videotape, video-
disc, conventional stereo TV broadcast, or sat-
ellite broadcast. Dolby Pro Logic processing
and playback through a properly calibrated
system will preserve the directionality, ambi-
ance, and spatial effects intended by the
source’s producers.
Dolby Digital ® provides proper playback
decoding processing for any discrete Dolby
Digital encoded digital audio source such as
an AC-3 Laser Disc or DVD disc. Dolby Digi-
tal provides up to 5 channels of discrete sur-
round information plus subwoofer.
DTS ® provides proper playback decoding
processing for any discrete Digital Theater
Systems (DTS) encoded digital audio source
such as a Laser Disc or DVD disc. Like Dolby
Digital, DTS is a proprietary digital system
providing up to 5 channels of discrete surround
information plus subwoofer.
THX ® Ultra™ is a set of patented technolo-
gies developed by THX engineers to accurately
translate the sound from the movie theater en-
vironment into the home, correcting tonal and
spatial errors. When the THX indicator is lit,
the following THX technologies are automati-
cally added after the Dolby Pro Logic, Dolby
Digital, or DTS decoder.
• Re-Equalization™: The tonal balance
of a film soundtrack will be excessively bright
and harsh when played back in the home
because it was originally designed to be
played in large movie theaters using very
different equipment. Re-Equalization restores
the correct tonal balance for movie
soundtracks in the smaller home environ-
ment.
• Timbre Matching™: The human ear
changes our perception of sound depending
on the direction from which the sound is
coming. In a movie theater, there is an array
of surround speakers so that the surround
information is all around you. In a home
theater, you only use two speakers located
to the side of your head. The Timbre Match-
ing filters the information going to the sur-
round speakers so that they more closely
match the tonal characteristics of the sound
coming from the front speakers. This en-
sures seamless panning between the front
and surround speakers.
• Adaptive Decorrelation™: In a movie
theater, a large number of surround speak-
ers help create an enveloping surround
sound experience. In a home theater, there
are only two surround speakers which can
reduce spatiousness and envelopment. Sur-
round sound can also collapse into the
closest speaker as you move away from
the middle seating position. Adaptive
Decorrelation slightly changes one surround
channel’s time and phase relationship with
respect to the other surround channel. This
expands the listening position and creates
the same spacious surround experience as
in a movie theater.
By pressing the MOVIE FILTER button on the
remote control, you activate the THX technolo-
gies described above. Movies that have been
encoded in Dolby Digital, DTS, Dolby Pro Logic,
Stereo, and Mono can all benefit from acti-
vating these THX features. THX should only be
activated for movies that were mixed for play-
back in large movie theaters. It need not be
activated for music, made for TV movies, sports,
talk shows or other programs mixed for small
rooms.
NOTE : All of the surround modes described
above are selected with the MODE button
(described below) except Dolby Digital , DTS,
and THX. Dolby Digital and DTS are auto-
matically activated when special digital codes
in the source material are detected. THX is
added to any of the other cinema surround
modes using the MOVIE FILTER button on the
remote control or during initial system setup
from the ON-SCREEN MENUS.
Mode Button
The MODE button selects one of the surround
modes described above. To make a selection,
press the MODE button (or the SURROUND
+ button on the remote). The LED above the
button will light. Each time you press the but-
ton while the LED is lit, the surround mode will
cycle to the next available setting as indicated
by the SURROUND MODE LEDs. In addition,
the surround mode setting may be changed
using the ON-SCREEN MENU system.
No selection is required when playing Dolby
Digital or DTS source material. These settings
are automatically engaged. THX can be added
to any of the cinema surround modes by press-
ing the MOVIE FILTER button on the remote
control.