Control And Indicator Description - Eventide INSTANT FLANGER FL201 Instruction Manual

CONTROL AND INDICATOR DESCRIPTION
in/out switch
EFFECT
MODIFIER
GROUP
This control switches the Instant Flanger In and out of
an audio circuit. When the switch is in the OUT position,
the unit is completely bypassed by a DC path and power need
not be applled.
These controls vary the nature of the effect produced by
the Instant Flanger. They operate on the control signals
and audio signals in the following manner:
BOUNCE: As this control is rotated clockwise, the flanging
control signal is progressively substituted for by a damped
sine wave initiated by changes in the control signal. This
damped signal swings the flanging back and forth by a dim
inishing amount for each swing, simulating the "hunting"
effect created by an AC or servo motor changing speed. At
full clockwise rotation of the BOUNCE control, only cijanges
in the control signal will affect the flanging. At full
CCW rotation, only the control signal itself will affect
the flanging.
DEPTH: The DEPTH control adjusts the relative mix of the
delayed signal and the direct signal. This is done in
such a way as to enhance the pseudo-stereo capability of
the Instant Flanger. The delayed signal is always present
at full amplitude at both the MAIN and Auxiliary outputs.
The DEPTH control adds a variable amount of direct signal
to both of these outputs, so that when the DEPTH control
is at either extreme, the delayed signal is at the same
amplitude as the direct signal. When the DEPTH control
is centered ("DOPPLER"), the direct signal is cancelled.
In the extreme CCW position, the direct signal is IN PHASE
with the delayed signal at the MAIN output, and OUT OF
PHASE with the delayed signal at the Auxiliary output.
Thus, for short delay times (A$ control fully CW), low
frequencies will be reinforced (as described in the theory
section of this manual) at the MAIN output, and cancelled
at the Auxil iary output. As the delay time at each output
is different, the flanging effect will not disappear when
the MAIN and Auxiliary outputs are mixed to monaural.
In the DOPPLER position, only the delay-varied signal is
present and thus the frequency response of the Flanger
is flat. As long as the control voltage remains constant,
there is no effect on the signal. As it is varied, however,
the delay varies, creating an apparent change in distance
between signal source and listener, and consequently varying
the frequency of the signal in a manner precisely analogous
to the variation produced by the doppler effect. The more
rapidly the control voltage is changed, the greater will be
the relative frequency deviation.
SUMMARY: The table opposite gives the effect present at
each output for various settings of the DEPTH control.