Lexicon DC-1 User Manual download pdf (Page 50)

Lexicon

DC-1 Effects

Available only in the THX and Dolby Digital versions of the DC-1, this film

sound mode reproduces musical material with maximum separation 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.

Logic 7

(THX and Dolby

Digital versions)

Parameter Initial Value Range

AUTO AZIMUTH ON ON/OFF

DIALOG ENHANCE 0.0dB 0.0dB, +3.0dB, +6.0dB

REAR ROLLOFF 8.2kHz 453Hz-20.0kHz

REAR DELAY OFFSET 5ms 0-20ms

RE-EQUALIZER ON ON/OFF

SIDE ASSIGN SIDE Front/Side, Front/Rear*

SURROUND LEVEL +0dB -5 to +5dB

SUBWOOFER LVL +0dB -5 to +5dB

EFFECT LEVEL +00dB -30 to +05dB

CUSTOM

* Dependent on speaker configuration

Logic 7 Parameters

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).

REAR ROLLOFF sets the cutoff frequency of a low pass filter in the rear-

channel. Frequencies above this setting are attenuated. This control should

be set high enough to give presence and airiness to the rear sound without

placing distracting instrumental overtones or other sounds behind you. In

systems configured without rear speakers, the settings affect the side out-

puts.

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Lexicon DC-1 User Manual Page 50

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