About The Reverberation Parameters - Lexicon LEXICON480LV4 Owner's Manual

Lexicon 480L Owner's Manual
Page One
RTM
Mid Reverb Time
Page Two
BAS
Bass Multiply
Page Three
[
Echo Level 1 L>L Echo Level 2 R>R
Page Four
[
Echo Delay 1

About the Reverberation Parameters

Page One
RTM (Mid-Frequency Reverb Time)
RTM sets the reverb time for mid-frequency signals
when the signal stops. Because low-frequency reverb
time (BASS MULT) is a multiplier of RTM, RTM acts as
a master control for the stopped reverb time. When
DECAY OPT is set to Reverb mode, the actual value
set for RTM varies with the setting of SIZE. SIZE should
be adjusted before RTM. This interaction is deacti-
vated when DECAY OPT is set to EFFECTS mode.
SHAPE
SHAPE and SPREAD work together to control the
overall ambience of the reverberation created by the
480L. SHAPE determines the contour of the reverb-
eration envelope. With SHAPE all the way down,
reverberation builds explosively, and decays quickly.
Note: SPREAD only functions when
SHAPE is set higher than eight.
As SHAPE is advanced, reverberation builds up more
slowly and sustains for the time set by SPREAD. With
SHAPE in the middle, the buildup and sustain of the
reverberation envelope emulates a large concert hall
(assuming that SPREAD is at least halfway up, and
that SIZE is suitably large—30 meters or larger.)
3-4
SHP SPR
Shape Spread
XOV RTC
Crossover RT Hi Freq. Cutoff
ECHO
PRE-
Echo Level 3 R>L
PRE- ECHO
Echo Delay 2 Echo Delay 3
SIZ
High Freq Cutoff
Size
DIF
DCO
Diffusion
Decay Optimization
ELS-
-LEV
Echo Level 5 L>L
Echo Level 4 L>R
-DEL AY5
Echo Delay 4 Echo Delay 5
SPREAD
SPREAD works together with SHAPE to control the
contour of the overall ambience of the sound created
by the 480L. SPREAD controls the duration of the initial
contour of the reverberation envelope (SHAPE con-
trols the envelope). Low SPREAD settings result in a
rapid onset of reverberation at the beginning of the
envelope, with little or no sustain. Higher settings
spread out both the buildup and sustain.
SPREAD and SHAPE control the rate at which reverb-
eration builds up, and how the reverberation sustains
as it begins to decay. When DECAY OPT is in Reverb
mode, SPREAD is linked to SIZE, and the actual value
for SPREAD depends on the selected SIZE.
SIZE
SIZE sets the rate of buildup of diffusion after the initial
period (which is controlled by DIFFUSION). It also acts
as a master control for RT MID and SPREAD. For this
reason, the SIZE control can be used to vary a reverb
sound from very large to very small. Generally, you
should set the SIZE control to approximate the size of
the acoustic space you are trying to create. The size in
meters is roughly equal to the longest dimension of the
space. Moving SIZE while a signal is present mom-
entarily mutes the reverb signal.
PDL
HFC
Predelay
MIX
Wet/Dry Mix
]
Echo Level 6 R>R
]
Echo Delay 6