Dolby Digital - Lexicon DC-1 - ADDENDUM Owner's Manual Addendum

DC-1 Effects

Dolby Digital

Dolby Digital Parameters
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The Dolby Digital effect decodes Dolby AC-3 encoded soundtracks. Unlike
analog Dolby surround decoding, Dolby Digital uses five discrete full-
range channels and a sixth dedicated, Low Frequency Effect (LFE) channel.
In this effect, any rear speakers present are connected in parallel with the
side speakers. This is the basic Dolby AC-3 effect. It does not include the
enhancements by Lexicon or LucasFilm which are available with other AC-
3 effects in the DC-1.
Parameter
AC-3 STATUS (display only — not user adjustable)
COMPRESSION
DIALOG ENHANCE
SIDE LEVEL
LFE MIX LEVEL
SUBWOOFER LVL
CUSTOM
AC-3 STATUS displays the current status of incoming AC-3 data. The
displayed items are not user adjustable.
COMPRESSION enhances the intelligibility of Dolby Digital material at
low volume levels (-6dB or lower). When set to AUTO, this control auto-
matically limits peak signals and boosts low level signals. The amount of
compression increases proportionately as volume is decreased. This is quite
useful when listening to Dolby Digital soundtracks at low output levels.
When set to ON, full compression is applied, regardless of volume.
DIALOG ENHANCE boosts dialog in the center channel. By targeting
specific frequencies, it can boost only dialog, without raising the entire
center channel level (which would alter the output balance achieved during
calibration).
SIDE LEVEL controls the output level of the side speakers. Use this control
in conjunction with SURROUND LEVEL to achieve the optimum balance
between the side and rear speakers.
LFE MIX LEVEL allows separate level attenuation of the LFE channel,
which is ultimately mixed to the subwoofer output. As the bass from as
many as five other channels is added to the LFE, it can significantly raise
subwoofer output levels — and create the risk of damage to a system.
Careful adjustment of this parameter will allow you to achieve proper tonal
balance and reduce the risk of damage.
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
Off Off, On, AUTO
+0.0dB +0.0dB, +3.0dB, +6.0dB
0.0dB +5 to -80dB, Off
+0.0dB -10.0db to +0.0dB
+0dB
Lexicon
Range
-5 to +5dB