Thx Cinema - Lexicon DC-1 - ADDENDUM Owner's Manual Addendum

DC-1 Digital Controller
This Effect, available only in DC-1s equipped with THX, Dolby Digital or
DTS 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.
Parameter
AUTO AZIMUTH
RE-EQUALIZER
SURROUND MODE
SUBWOOFER LVL
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.
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.
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.
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.
Initial Value
ON
ON
DECORR STEREO, DECORR
+0dB

THX Cinema

THX Cinema Parameters
Range
ON/OFF
ON/OFF
-5 to +5dB
DC-1Effects
15