What Is Chorus; What Is Flanging - Alesis MIXING CONSOLES Reference Manual

SECTION 4
There are 24 different Chorus Algorithms (Chorus versions), in the
MIDIVERB III. Each algorithm has a different sound and simulates a
different pitch based effect.
There are two major types of algorithms: Chorus and Flanging (see
explanation below). Both Chorus and Flanging have 6 algorithms of
mono and 6 algorithms of stereo. See Figure 6.
FIGURE 6
CHORUS ALGORITHM
DISPLAY
Mono Stereo
C1 SC1
C2 SC2
C3 SC3
C4 SC4
C5 SC5
C6 SC6

WHAT IS CHORUS?

As the name implies, the Chorus effect is used to make one instrument
sound like two or more instruments played together. Just as a string
section, with its tiny variations in tuning and timing, sounds thicker than a
single violin, so does a guitar or keyboard sound bigger and more
interesting when a bit of chorusing is applied.
Mono Chorus is achieved by splitting the signal into two, then slightly
delaying and detuning one of the parts. In Stereo Chorus, the signal on
the left will detune in one direction while the signal on the right detunes in
the other direction.

WHAT IS FLANGING?

First used in the sixties, "Flanging" was achieved by the use of two tape
recorders that would record and play back the same program in
synchronization. By alternately slowing down one tape machine, and
then the other, different phase cancellations would occur. Since the
slowing down of the tape machines was done by hand pressure against
the flanges of the tape supply reels, the term "Flanging" came into being.
Today, Flanging can be closely simulated by many outboard effects
processors such as the MIDIVERB III. The effect of Flanging, either
electronically or mechanically done, is achieved by splitting and slightly
delaying one part of the signal, then varying the time delay, with an LFO
(Low Frequency Oscillator). The delayed signal is then mixed back with
the original signal to produce the "swishing" or "tunneling" sound. Many
FLANGING ALGORITHM
Depth Mono
Smallest Depth
Small Depth
Medium Depth
Medium Depth
Big Depth
Biggest Depth
DISPLAY
Stereo Depth
F1 SF1 Smallest Depth
F2 SF2 Small Depth
F3 SF3 Medium Depth
F4 SF4 Medium Depth
F5 SF5 Big Depth
F6 SF6 Biggest Depth
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