Logic 7 - Lexicon DC-1 - ADDENDUM Owner's Manual Addendum

DC-1 Effects

Logic 7

Logic 7 Parameters
16
This film sound mode reproduces musical material with maximum separa-
tion at all times, whether or not directional material is being steered. In
addition, Logic 7 uses intelligent steering to extract wide bandwidth stereo
surround channels. If both side and rear speaker pairs are available, signals
may be steered between the left side and left rear, or between the right side
and right rear. It is also possible for a signal to be steered fully to the rear
speakers, with the side surround speakers 6dB lower than the rears to
provide subjective rear imaging.
Logic 7 contains the re-equalizer feature of the THX Cinema effect, as well
as Lexicon's proprietary dialog enhancement feature. The combination of
stereo surround information during music and decorrelated effects, with
discrete steering to the sides and rears, gives Logic 7 unrivaled performance
on surround encoded films.
Parameter
AUTO AZIMUTH
DIALOG ENHANCE
RE-EQUALIZER
SOUNDSTAGE
REAR DELAY OFFSET
SURROUND ROLLOFF
SURROUND LEVEL
SUBWOOFER LVL
EFFECT LEVEL
CUSTOM
AUTO AZIMUTH is short for auto azimuth error correction/automatic
input balance. Auto Azimuth should be set to ON for films, and OFF for
music. When ON, special patented algorithms continually monitor the
input signal and adjust both the relative level and time offset of the two
channels to keep the dialog properly centered and special effects properly
localized. This automatic feature is the reason the unit does not need an
input balance control for Dolby Surround decoding.
DIALOG ENHANCE boosts dialog in the center channel. By targeting
specific frequencies, it boosts 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.
SOUNDSTAGE controls the level of the surround speakers relative to the
front speakers in a dynamic way. The DC-1 attempts to detect whether or
not the sound source was originally encoded from a surround source by
looking for occasional bursts of rear-steered material, and by identifying the
directional orientation of the background sound between strong sounds.
Initial Value
ON
0.0dB 0.0dB, +3.0dB, +6.0dB
ON
REAR FRONT,NEUTRAL, REAR
5ms
6.9kHz 453Hz-20.0kHz
+0dB
+0dB
+00dB
Lexicon
Range
ON/OFF
ON/OFF
0-20ms
-5 to +5dB
-5 to +5dB
-30 to +05dB