Music Surround - Lexicon DC-1 - ADDENDUM Owner's Manual Addendum

DC-1 Digital Controller
Music Surround, available in the THX, Dolby Digital and DTS versions of
the DC-1, is a surround effect developed specifically for classical music
listening. It makes full use of additional loudspeakers placed at the center,
sides and rear of the room. This effect passes unprocessed left and right
information directly to the front left and right speakers.
Parameter
CENTER LEVEL
SOUNDSTAGE
SIDE ROLLOFF
REAR ROLLOFF
REAR DELAY OFFSET
SURROUND LEVEL
SUBWOOFER LVL
EFFECT LEVEL
CUSTOM
CENTER LEVEL attenuates the level of the center channel and can turn it
off completely.
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.
Whenever there is an indication that the source was originally surround
encoded, the Soundstage control automattically reverts to the REAR setting
— which gives the rear speakers full level. The NEUTRAL position attenu-
ates the rear speakers 3dB. The FRONT position attenuates the rear speakers
6dB. The effect is to move the listening position forward in the listening
space.
SIDE ROLLOFF provides a high frequency cutoff for the side speakers. The
optimal setting for this control will vary widely with the source material.
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.
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.
SURROUND LEVEL controls the volume level of the side and rear speakers.
Although we have selected a default value, the correct setting will vary with
each recording, the room, and your personal taste.
Initial Value
16
NEUTRAL FRONT, NEUTRAL, REAR
4.0kHz 453Hz20.0kHz
4.0kHz 453Hz20.0kHz
15ms
+0dB
+0dB
+00dB
Range
0-30
0-20ms
-5 to +5dB
-5 to +5dB
-30 to +05dB
DC-1Effects

Music Surround

Music Surround Parameters
13