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SECTION 4
28
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 FLANGING ALGORITHM
DISPLAY DISPLAY
Mono Stereo Depth Mono Stereo Depth
C1 SC1 Smallest Depth F1 SF1 Smallest Depth
C2 SC2 Small Depth F2 SF2 Small Depth
C3 SC3 Medium Depth F3 SF3 Medium Depth
C4 SC4 Medium Depth F4 SF4 Medium Depth
C5 SC5 Big Depth F5 SF5 Big Depth
C6 SC6 Biggest Depth F6 SF6 Biggest Depth
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