Lexicon LEXICON480LV4 Owner's Manual page 112

Page One
SPD
Speed L
Page Two
PDL
Predelay
Page Three
FBK
Feedback Level L Feedback Level R
The Prime Time III Program
The Prime Time algorithm provides left and right con-
trol mechanisms for predelay, high frequency rolloff
(6db/octave), max pitch shift, speed, time event length,
feedback, x-feedback, input delay, and delay pan. The
input signal goes into a stereo delay line which has
three modulation controls: MAX L&R, SPEED L&R,
and WINDOW L & R. The glide is performed inside the
delay lines, thus it is possible to have large amounts of
delay but retain control of the overall modulation effect.
These three glide parameters interact with each other.
Speed is the rate of climb (acceleration slope) to
maximum pitch shift; MAX is maximum amount of pitch
shift; WIN is the time event length. WIN defines the
amount of time over which the entire glide event takes
place. The actual time that it takes a cycle of modula-
tion to complete is determined by speed and the MAX
pitch shift. The delay will always speed up to MAX and
then back down again, which takes a certain amount of
time. This time can be lengthened by setting WIN large.
This allows long flanges with low pitch shifts to be
achieved. Window is specified in samples, a unit of
time. Feedback paths are routed outputs to inputs and
x-feedbacks are routed outputs to opposite inputs. An
input delay is provided to match the pre-delay for "over
the top" type flanges while mixing "internally" in the box.
The treble filter is functionally placed at the output of the
algorithm.
SPD MAX
Speed R Max Pitch Shift L
PDL IND
Predelay Dry Delay L
FBK CFB
Cross Feedback L
Bank 15: the Prime Time III Programs
MAX
Window L
Max Pitch Shift R
IND
Dry Delay R Treble Cut
CFB
Cross Feedback R Pan L
About the Parameters
Page 1
SPD (Speed )
SPD controls the acceleration rate to reach maximum
pitch shift. There are two controls for SPD, one for the
left and one for the right.
MAX (Maximum Pitch Shift)
MAX sets the maximum amount of equivalent pitch
shift. Each step is equivalent to 6 cents of pitch shift.
The total maximum pitch shift can be set for 180 cents
— almost a full tone. There are two independent
controls for left and right.
WIN (Window)
Left and Right WIN controls define the minimum
amount of time over which the entire glide event takes.
WIN is specified in samples, a unit of time.
WIN WIN
Window R
TRB MIX
Wet/Dry Mix
PAN PAN
Pan R
12-2