Lexicon Digital Controller DC-1 - Manual (Page 56)

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Lexicon
DC-1 Effects
REAR ROLLOFF sets the frequency above which the rear-channel sound is
attenuated. The appropriate setting will vary with the program material. It
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
outputs.
REAR DELAY adjusts the amount of time between the appearance of a
signal in the front channels and its emergence from the rear. Generally, the
correct delay is about 16 milliseconds, but the setting depends on speaker
set-up and source material. In general, the delay should be low enough so
that the rear sound does not become identifiable as a distinct source. In
systems configured without rear speakers, the settings affect the side out-
puts.
CENTER LEVEL adjusts the output level from the center speaker.
BASS CONTENT allows you to modify the bass content for Mono, Stereo or
Binaural recordings. The BINAURAL setting turns the rear level parameter
off and activates special low-frequency compensation. This feature is
offered specifically for true binaural recordings made with a dummy head.
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.
EFFECT LEVEL adjusts the loudness of the side and rear speakers. When
there are no side speakers, it adjusts the amount of ambient signal mixed
into the main loudspeakers.