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PCM Effects and Parameters
component of the input to the effect is reduced while the stereo component
is increased.
If the input signal is pure monaural speech the reverb is almost entirely
attenuated. SPEECH DETECT is a real benefit to some popular music
(where spoken voice, such as rap, occurs along with the music), stereo
television and early stereo movies. Any stereo material which was not
carefully mixed for Surround is a good candidate for playing through the
Nightclub, Concert Hall, Church or Cathedral Effect with speech detect on.
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.
SURROUND LEVEL adjusts the loudness of the signals sent to the rear
channels. This control should be set so that the rear is audible without
calling attention to itself. Numerical values and screen graphics are dis-
played during adjustment. The settings also affect the level of the side
outputs.
SURROUND ROLLOFF allows the high frequencies of the surround chan-
nels 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 sur-
round source is detected, these filters are removed, 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 set-
tings also affect the side outputs.
SURROUNDS selects the type of surround decoding used by the DC-2.
STEREO 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 surround channel to provide
added spaciousness and envelopment.
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).