Lexicon LEXICON480LV4 Owner's Manual page 42

0 dB
-30 dB
SHAPE Set All the Way Down.
0 dB
-30 dB
SHAPE at 64 - 1/4 of the Way Up.
0 dB
-30 dB
SHAPE at 128 - 1/2 of the Way Up.
0 dB
-30 dB
SHAPE at 255 - All the Way Up.
Short RT MID Setting.
Time
Time
Time
Time
Banks 1-4: the Reverb Programs
The apparent size of the space created is actually a
combination of the settings of the SIZE, SHAPE, and
SPREAD controls. Small acoustic spaces are charac-
terized by a rapid buildup of diffusion. However, both
small and large spaces frequently have an uneven
buildup of initial reverberation. This uneven buildup is
what is controlled by the SPREAD and SHAPE con-
trols.
HF CUTOFF
HF CUTOFF sets the frequency above which a 6 dB/
octave low-pass filter attenuates the processed signal.
It attenuates both preechoes and reverberant sound.
High frequencies are often rolled off with this parame-
ter, resulting in more natural sounding reverberation.
PREDELAY
PREDELAY sets the amount of time which elapses
between input of signal and the onset of reverberation.
Under natural conditions, the amount of predelay de-
pends on the size and construction of the acoustic
space and the relative position of the sound source and
the listener(s). PREDELAY attempts to duplicate this
phenomenon and is used to create a sense of distance
and volume within an acoustic space. Relatively long
PREDELAY settings place the reverberant field behind
rather than on top of the input material. Extremely long
PREDELAY settings produce unnatural sounds that
often prove interesting.
A sense of continuity between source and reverb is
maintained up to around 40 ms of predelay, after which
the sound begins to separate into distinct patterns;
however, large values of PREDELAY can effectively
give the impression of large size if early reflections are
used to fill in the spaces between input and the delayed
reverberation.
Much of the effect of PREDELAY can be better
achieved by using medium values of SHAPE, and
setting the desired apparent predelay with SPREAD.
Setting these parameters should be done by ear, since
the values don't relate directly to ms.
Note: Very high values of PREDELAY limit the
amount of SPREAD available. The display does not
reflect this, however.
3-5