Lexicon LEXICON480LV4 Owner's Manual page 98

MODE
Selects between linked and unlinked modes of opera-
tion for RT MID, SHP, SPR, and SIZ parameters. The
Reverb mode maintains optimum relational values
between these controllers as settings are changed.
Effects mode permits independent parameter control.
WET/DRY MIX
WET/DRY MIX controls the ratio of direct vs. effect
signal in the output from a program. When the 480L is
patched into a console, this control should almost
always be set to 100% wet. When an instrument is
plugged directly into a 480L, or when the Cascade
configuration is in use, a setting between 45 and 60%
is a good starting point for experimentation with this
parameter.
WET/DRY MIX is a sine/cosine fade. Practically
speaking, this means that MIX can be adjusted over its
range with little or no change in output level. When you
control mix at the console, adding effect to the dry
signal increases overall level.
Page Three
PREECHO LEVEL
Preechoes can best be understood by visualizing a
stage where the early reflections are the sounds ema-
nating from the rear and side stage walls directly after
the sound from the stage. Usually the rear stage wall
reflection is earlier and louder than those from the two
side walls. The preechoes are actually clusters of
echoes, with the density of the cluster set by DIFFU-
SION.
The preecho reflection parameters change the per-
ceived locations of reflecting surfaces surrounding the
source. PREECHO LEVEL adjusts the loudness of the
reflection.
Controls are similar to those available in the standard
Reverb programs. However, there are only 4 pre-
echoes. The remaining two sliders on Page 3 control
SPIN and WANDER, as in the EFFECTS or AMBI-
ENCE program .
Banks 11-12: the Random Halls and Spaces Program
SPN (Spin)
SPN is identical to the spin control in the EFFECTS
program. It affects the movement of many of the delay
taps in the program. The object of SPN and WAN is to
continuously alter the timbre of the reverberant sound.
This makes the result more natural. It is not intended to
make the position of instruments unstable. SPN should
typically be 37 or higher. High values may make the
pitch of piano or guitar unstable.
WAN (Wander)
WAN is identical to the wander control in the EFFECTS
program. It sets the distance in time that the early
reflections will move. For best results WAN should be
about 10ms at larger sizes.
Page Four
PREECHO DELAY TIME
For each of the PREECHO LEVEL parameters, there
is a corresponding PREECHO DELAY TIME parame-
ter. PREECHO DELAY TIME sets the delay time in ms
for one of the preechoes. PREECHO DELAY TIME is
not affected by PREDELAY, so preechoes can be
placed to occur before the reverberation starts.
REVERB LEVEL
Digitally controls the output gain from the processor.
This is useful for setting different versions of overall
program balance. This parameter may also be con-
trolled via MIDI, which allows the amount of reverb to
be easily controlled remotely without affecting the wet/
dry mix.
SHELF
A level control that adds pre-high frequency cutoff
energy to the reverb output, allowing a double "knee"
in the low pass filter.
10-4