Lexicon DC-1 - REV 1 Owner's Manual page 9

Introduction
to the DC-1
2
When a listener is in the correct spot the Panorama effect provides an almost
ideal recreation of the original recording space. It works by using digital
signal processing to cancel the crosstalk between the listener's ears, effec-
tively spreading the sound from the two front loudspeakers in a wide arc in
front of the listener. With the optional addition of rear speakers, Panorama
can be startling in its realism.
The Nightclub, Concert Hall, Church and Cathedral effects transform the
listening room into a new acoustic space, letting you choose an environment
which matches your music or your mood. Unlike most ambience proces-
sors, the DC-1 provides full stereo processing, preserving the critical SI
information in the recording and expanding upon it. The Nightclub and
Concert Hall effects generate the side and rear reflection patterns of ideal-
ized rooms and concert halls. The larger spaces add the true depth and
realism of a concert hall to classical and popular music, while the smaller
spaces are ideal for jazz and rock. The Church and Cathedral effects are
similar, but place more emphasis on rich, dense reverberant decay than on
early reflections. These effects are especially good for simulating large,
highly reverberant spaces such as churches, stadiums, and cathedrals.
The requirements for processing sound for home theater are quite different
than those for music. Lexicon invented the technology that permits the most
accurate reproduction of film sound in the same system that is used for
music listening, and the software-based DC-1 is optimized for each of these
unique tasks. The Music Surround mode is specifically designed to opti-
mally play conventional stereo music through any system which includes
side or side-located rear speakers. Additionally, the DC-1 is able to perform
automatic analysis and error correction to compensate for problems in the
source material.
For films encoded with Dolby Surround, Lexicon has incorporated the
Lucasfilm Home THX Cinema processing into the THX-equipped version
of the DC-1. This utilizes a patented, completely digital Dolby Pro Logic
Surround decoder, and is the only one with automatic correction of inter-
channel phase and channel-balance errors (the most common audio prob-
lems in currently available video releases of films).
A Stereo Surround feature extracts five channels of surround information
from a standard 4-2-4 matrix-encoded soundtrack (Dolby Surround,
Ultra*Stereo, etc.) This feature, available in the THX equipped version,
allows the stereo music in soundtracks to be reproduced with a full stereo
spread, unencumbered by the relatively narrow separation of the front
speakers. Left-to-surround, and right-to-surround pans are also enhanced.
Instead of sound jumping from a front channel to both surrounds, the left
and right side speakers can function independently to facilitate smooth and
fluid pans. Sounds directed to hard left and hard right (the main left and
right speakers) will not appear in the side surrounds.
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