Lexicon Digital Controller DC-1 - Manual (Page 49)

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DC-1 Digital Controller
DC-1Effects
Parameter Initial Value Range
AUTO AZIMUTH ON ON/OFF
SURROUND MODE DECORR STEREO, DECORR
RE-EQUALIZER ON ON/OFF
SUBWOOFER LVL +0dB -5 to +5dB
CUSTOM
This Effect, available only in DC-1’s equipped with THX or Dolby Digital
processing, provides Home THX Cinema surround decoding for any Dolby
surround encoded movies, music or television programs. The effect is
similar to Pro Logic, but includes the features of re-equalization, timbre
matching and decorrelation. The surround channels are monaural, but can
be decorrelated. This effect can be reset to use the Logic 7 stereo surrounds
with the Stereophonic setting of Surround Mode, although full separation
between the sides and the rear speakers is not available. THX Cinema
(THX and Dolby
Digital versions)
THX Cinema 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.
SURROUND MODE selects the type of surround decoding used by the
DC-1. STEREOPHONIC provides extraction of five channels of surround
information from a standard 4-2-4 matrix-encoded soundtrack (Dolby
Surround, Ultra*Stereo, etc.) The drama of this effect is dependent on the
source material and is most noticeable with strong stereo music soundtracks.
The DECORRELATED setting electronically scrambles the monaural sur-
round channel to provide added spaciousness and envelopment.
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.
SUBWOOFER LVL boosts or cuts the subwoofer output level. Although the
normal subwoofer level is set during the calibration procedure, with some
recordings it may be desirable to increase or decrease this deep bass level.