44
Lexicon
PCM Effects and Parameters
SURROUND ROLLOFF allows the high frequencies of the surround
channels to be attenuated with the same detection circuitry as that
described for the Soundstage control. The attenuation is quite attractive
on many music and broadcast sources which were not mixed for
surround. When a surround source is detected, these filters are re-
moved, so the rear speakers can reproduce surround events with full
bandwidth. 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. The settings also affect the side
outputs.
SURROUNDS selects the type of surround decoding used by the
MC-1. STEREO provides extraction of five channels of surround infor-
mation from a standard 4-2-4 matrix-encoded soundtrack (Dolby Sur-
round, 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 alters the
monaural surround channel to provide added spaciousness and envel-
opment.
VOCAL ENHANCE boosts vocals in the center channel. By targeting
specific frequencies, it can boost only vocals, without raising the entire
center channel level (which would alter the output balance achieved
during calibration).
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