Alesis QS6.1 Reference Manual page 84

MONO FLANGE
First used in the 1960s, ÒflangingÓ was achieved by using two tape recorders to
record and play back the same material at the same time. By alternately slowing
down one tape machine, and then the other, an interesting phase cancellation could
be generated. There is a much-repeated legend that this slowing down was done by
pressing fingertips againsts the flanges of the tape supply reels, hence the effectÕs
name. But nobody actually knows for sure.
Flanging is achieved by splitting a signal and giving one part of it a variable time-
delay. (This is similar to Chorusing, except here we use the LFO to modulate delay
time instead of pitch.) The delayed signal is then mixed back with the original sound
to produce that well-known ÒswooshingÓ or Òdoppler tunnelÓ sound.
DRY
SIGNAL
As with Chorusing, the Flanging algorithm offers great things to play with. The
speed and depth of the LFO can be varied, and part of the signal can be fed back into
itself to make the effect stronger. This feedback setting can be either ÒNormalÓ or
ÒInvertedÓ. Try using ÒInvertedÓ for a more dramatic flange.
STEREO FLANGE
In a Stereo Flange, the signal is split into three parts: a dry signal and separate left
and right signals, each with its own delay. While one channel flanges up the other
channel automatically flanges down, making the effect more pronounced.
DRY
SIGNAL
QS6.1 Reference Manual
LFO
DELAY
FEEDBACK
DRY SIGNAL
DRY SIGNAL
FEEDBACK
DELAY
LFO
DELAY
FEEDBACK
DRY SIGNAL
Part 6: Editing Effects
FLANGED
OUTPUT
LEFT
FLANGED
OUTPUT
RIGHT
FLANGED
OUTPUT
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