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Dolby Virtual Speaker is a technologycertified
by Dolby Laboratories that creates a virtualized
surround sound experience from two speakers using
a multichannel Dolby Digital source. Additionally,
Dolby Virtual Speaker can simulate the surround
sound effect produced by Dolby Pro Logic or Dolby
Pro Logic II.
Dolby Virtual Speaker retains all the original
Multichannel audio information and provides the
listener with the sensation of being surrounded by
additional speakers.
Manufactured under license from Dolby Laboratories.
“Dolby”, “Pro Logic”, “Surround EX”, and the double-
D symbol are trademarks of Dolby Laboratories.
Circle Surround II (CS-II) is a powerful and versatile
multichannel technology. CS-II is designed to enable
up to 6.1 multichannel surround sound playback
from mono, stereo, CS encoded sources and other
matrix encoded sources. In all cases the decoder
extends it into 6 channels of surround audio and a
LFE/subwoofer signal. The CS-II decoder creates a
listening environment that places the listener “inside”
music performances and dramatically improves
both hi-fi audio conventional surround-encoded
video material. CS-II provides composite stereo rear
channels to greatly improve separation and image
positioning– adding a heightened sense of realism to
both audio and A/V productions.
CS-II is packed with other useful feature like dialog
clarity (SRS Dialog) for movies and cinema-like bass
enrichment (TruBass). CS-II can enable the dialog
to become clearer and more discernable in movies
and it enables the bass frequencies contained in
the original programming to more closely achieve
low frequencies–overcoming the low frequency
limitations of the speakers by full octave.
Circle Surround II, Dialog Clarity, TruBass, SRS and
symbol are trademarks of SRS Labs, Inc.
Circle Surround II, Dialog Clarity and TruBass
technology are incorporated under license from SRS
Labs, Inc.
HDCD
®
(High Defi nition Compatible Digital
®
) is a
patented process for delivering on Compact Disc the
full richness and details of the original microphone
feed.
HDCD encoded CDs sound better because they are
encoded with 20-bits of real musical information as
compared to 16-bits for all other CDs.
HDCD overcomes the limitation of the 16-bit CD
format by using a sophisticated system to encode
the additional four bits onto the CD while remaining
completely compatible with the CD format.
When listening to HDCD recordings, you hear more
dynamic range, a focused 3-D sound stage, and
extremely natural vocal and musical timbre. With
HDCD, you get the body, depth and emotion of the
original performance not a fl at, digital imitation.
HDCD system manufactured under license from
Microsoft. This product is covered by one or more
of the following: In the United States 5,479,168
5,638,074 5,640,161 5,808,574 5,838,274 5,854,600
5,864,311 5,872,531 and in Australia 669,114 with
other patents pending.
HDMI, the and High-Defi nition Multimedia
Interface are trademarks or registered trademarks of
HDMI Licensing LLC.
There are several factors that can degrade the sound
from even the best loudspeakers in a listening room.
One of the most important is the interaction of sound
from the loudspeakers with large surfaces such as
walls, the fl oor, and the ceiling in the room. Even
with careful loudspeaker placement and acoustical
treatments, there are signifi cant problems that are
caused by room acoustics. These include refl ections
from nearby surfaces and standing waves that are
created between large parallel surfaces in the room.
In a home theater the situation is further complicated
because there are several listening locations. The
effects of room acoustics on the sound arriving at
each person’s ears are very different and the result is
a listening experience that is degraded in a different
way for every person in the room. It is not uncommon
to have variations in two adjacent seats that are as
large as 10 dB, particularly in the frequency range
below 250 Hz.
The solution to this problem is to apply room correction
after precisely measuring how each loudspeaker
interacts with the room. Because the room causes
variations in the frequency response of the
loudspeakers that are so large from seat to seat, it
is important to measure each loudspeaker at several
locations in the listening room. This should be done
even if there is only one listener. Measurement at a
single location is not representative of the acoustical
problems in the room and will in most cases, degrade
overall performance. Audyssey MultEQ is the only
technology that can achieve room correction for
multiple listeners in a large listening area. It does so
by combining the data collected at several points in
the room from each loudspeaker and then applying
correction that minimizes the acoustical effects of
the room and is matched to the frequency resolution
of human perception (known as psychoacoustics).
Furthermore, MultEQ correction is applied both
in frequency and time domains and so there are
no artifacts (such as smearing of sound or modal
ringing)that are sometimes associated with traditional
methods of room equalization.
In addition to correcting frequency response problems
over a wide listening area, Audyssey MultEQ
provides a completely automated sound system set-
up process. It identifi es how many loudspeakers are
connected to the amplifi ers and whether they are full-
range, satellites, or subwoofers. If there is a least one
subwoofer connected, Audyssey MultEQ determines
the optimum crossover frequency between each
satellite and the subwoofer(s). It automatically
checks the polarity of each loudspeaker and alerts
the user if there are any that may be wired out-
of-phase relative to the others. It measures the
distance to each loudspeaker from the main listening
position and adjusts the delays so that sound from
each loudspeaker arrives at the same time. Finally,
Audyssey MuitEQ determines the playback level of
each loudspeaker and adjusts the volume trims so
that all levels are equal.
MultEQ and the Audyssey MultEQ logo are
trademarks of Audyssey Laboratories, Inc. All rights
reserved.