TC Electronic NM-1 Nova Modulator - Manual (Page 18)

18
EFFECT TYPES: FLANGER
+VARIATION Button
The +VARIATION button allows you to select between
two distinct flavors of tape flanging effects: negative
and positive summing.
The button essentially flips the phase of the "flanged"
signal 180 degrees, creating radically different sounds
particularly when the two signals are mixed together.
With negative summing (+VAR “off”) the delayed signal
is phase reversed resulting in severe frequency
cancellations as the two signals get closer to the zero
point. When the two signals are exactly at the same
point they will cancel out each other completely.
Positive summing (+VAR “on”) happens when the
delayed signal is in phase with the dry signal. When
mixed the result is a warm, less extreme, but very
musical sound that gets more pronounced as the
delayed signal gets closer to the zero point.