Lexicon LEXICON480LV4 Owner's Manual page 105

Page 2
SPN (Spin)
SPN is identical to the spin control in the EFFECTS
algorithm. It affects the movement of several early
reflections. The object of SPN (and WAN) is to continu-
ously alter the timbre of the early reflection parts of the
ambient sound. This makes the result more natural. It
is not intended to make the position of instruments
unstable.
WAN (Wander)
WAN is also identical to the wander control in the
EFFECTS algorithm. It sets the distance in time that
the early reflections will move.
PDL (Predelay)
PDL adds an additional delay to the reflections and to
the reverberation. Normally PDL should be set to 0,
since the delays in the program will have already been
set correctly by the hall synthesis. This control may be
useful in a sound reinforcement situation, or for ambi-
ence effects.
IND (Dry Delay)
IND controls the amount of delay in the dry signal mixed
by the MIX control. Normally, this control should be set
to 0. This control may be useful in a sound reinforce-
ment situation, when both delayed dry sound and
synthesized reflections are desired.
MIX (Identical to Wet/Dry mix above)
MIX is the same as other standard 480L programs.
Keep in mind that, in the Ambience program, MIX
closely simulates microphone proximity effect. For
convenience, this control has been placed on both
Pages 1 and 2.
Banks 13-14: the Ambience Programs
Using the AMBIENCE Program to Match
Recorded Ambience
On Page One, set Reverb Level (Slider 2) to 0. You
should now be listening to the ambient build of the
space.
Matching the High Frequency Contour
This step involves closely approximatingthe High Fre-
quency contour of the original sound source (the pre-
dominant instrument, vocalist, etc.)
Move the HF CUT control to its highest value. This is
likely not to be the correct value. Now, set HF CUT to
its lowest value. This is also likely to be incorrect. To
locate the correct value, adjust HF CUT between these
two points while listening carefully. Make this adjust-
ment BY EAR — no by reference to displayed values.
Once you think you have determined the optimal point,
move the slider above and below the value to confirm
your selection.
Matching Room Size
Approximating the ambient build of the space requires
adjustment of the SIZE control. Use the same tech-
nique as that described for establishing a value for HF
CUT.
Set the MIX value to 90%, or listen to the DRY signal
from time to time to hear where you are.
Note: The SIZE control does not update in real-time. To
simplify the listening process, start at the highest
setting of SIZE, and decrease the value by 5 meter
increments, listening for:
an extraneous delay when the value is too high, or
a "cramping" of the program material when the value is
too low.Use low frequency information to "zero in" on
the correct value. Once you have found a value you
think is correct, move SIZE two values above and
below your selection to confirm your choice.
Creating Depth
The MIX control in the Ambience programs emulates
the movement of a coincident pair of microphones from
the sound source into the room.
Until now, with MIX set to nearly 100% wet, you have
been listening at the rear of the ambient space created
by the SIZE control. Slowly moving MIX to 100% dry,
simulates moving the microphone pair closer to the
sound source.
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