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Lexicon
DC-1 Effects
5.1 Logic 7
(Dolby Digital version)
5.1 Logic 7 combines all the features of Dolby Digital AC-3 with enhance-
ments by Lexicon and LucasFilm. This effect uses Logic 7 matrix technology
to enhance the steering between the side speakers and the rear speakers, so
sounds intended to come from behind the listener actually do come from
behind. This effect also includes the adaptive decorrelation and re-equalizaer
features of THX 5.1.
5.1 Logic 7 provides the ultimate in film reproduction. It brings out all the
increased excitement and spaciousness a 7 channel speaker system can
produce.
Parameter Initial Value Range
AC-3 STATUS (display only — not user adjustable)
COMPRESSION Off Off, On, AUTO
DIALOG ENHANCE +0.0dB +0.0dB, +3.0dB, +6.0dB
RE-EQUALIZER Off On, Off
REAR DELAY OFFSET 0ms 0-20ms
SURROUND LEVEL +3dB -5 to +5dB
LFE MIX LEVEL +0.0dB -10.0db to0.0dB
SUBWOOFER LVL +0dB -5 to +5dB
EFFECT LEVEL 0dB -30dB to +05dB
CUSTOM
5.1 Logic 7 Parameters
AC-3 STATUS displays the current status of incoming AC-3 data. The
displayed items are not user adjustable.
COMPRESSION enhances the intelligibility of Dolby Digital material at
low volume levels (-6dB or lower). When set to AUTO, this control auto-
matically limits peak signals and boosts low level signals. The amount of
compression increases proportionately as volume is decreased. This is quite
useful when listening to Dolby Digital soundtracks at low output levels.
When set to ON, full compression is applied, regardless of volume.
DIALOG ENHANCE boosts dialog in the center channel. By targeting
specific frequencies, it can boost only dialog, without raising the entire
center channel level (which would alter the output balance achieved during
calibration).
RE-EQUALIZER equalizes the left, center, and right channel outputs to
match the overall frequency balance of the original recording. Without this
re-equalization, many films and some television programs will sound too
bright.
REAR DELAY OFFSET is an additional delay added to the rear channels.
This delay increases the apparent size of the listening space by increasing
the rear delay time. Feel free to experiment to find the setting that works
best.