Flanging; Function Generator - Lexicon Prime Time 93 Owner's Manual

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FLANGING
To set up a flanging effect, bring up the second delay in the OUTPUT MIX to
the same level as the first. Then adjust the DELAY SELECT controls for de-
lay times which are within about three to ten msec of each other (the closer
the delays are to each other, the higher the frequency of the flange). This
creates a
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Combn filter which is perceived as an emphasized frequency com-
ponent determined by the delay difference. Slowly turn the DELAY ADJUST
control to make a flange (which is just a frequency sweep of the comb fil-
ter). Depending upon the source material, comb filtering effects can be
used over a range of delay differences from .5 to 70 msec. Switch to high-
er delay times to make the 11 doppler 11 pitch shifting phenomenom more appar-
ent, adding its effect to the
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comb
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filter flanging.
FUNCTION GENERATOR
While the effects above were achieved manually with the DELAY ADJUST control,
they can also be done automatically using the built-in function generator
controlled by the DEPTH and FREQUENCY controls. Turning the DEPTH control
up corresponds to increasing the amount of rotation of the DELAY ADJUST
control. When it is fully counterclockwise it has no effect, but fully up
it encompasses the entire delay range of the VCO (from the indicated delay
setting to half of that setting) and renders the DELAY ADJUST control in-
operative. Turning the FREQUENCY control up corresponds to increasing the
speed with which the DELAY ADJUST is turned back and forth. It ranges from
one cycle every 10 seconds to 20 cycles per second. As in the case of man-
ual control, the greater the frequency and the greater the excursion, the
more pitch shifting there is. When flanging, turn up the DEPTH control to
increase the rate of the sweep and the amount of pitch shifting (doppler)
accompanying it.
DELAY BYPASS
When creating special effects such as flanging and pitch shifting, DELAY
BYPASS can be used to make an
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A-B
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comparison with the original source.
It can also be used to switch the effect in and out as needed. The DELAY
BYPASS function connects the output of the INPUT MIX to the MASTER control
of the OUTPUT MIX, thus bypassing four OUTPUT MIX controls. The levels of
these four controls can make the overall output level differ depending upon
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