The Chorus/Flanger Effect - Access virus classic Handbuch

Locate the parameter group UNISON in the EDIT menu.
MENU
DISPLAY
UNISON mode determines how many voices the Virus will use to render a played note. In a nutshell,
it determines how "fat" the sound will be. You can use the UNISON Detune parameter to determine
to which extent the active voices are detuned. UNISON PanSpread distributes them uniformly
across the stereo panorama, a process by which you can also determine the width of a sound's
stereo base. When you activate UNISON mode for a sound, it can still be played polyphonically.
However, depending on the number of voices you've dialed in, its polyphony will of course be con-
siderably reduced in UNISON mode. The most efficient and the standard setting is UNISON mode =
Twin, where two voices are played for every note. In the "OFF" position, one voice per note is
played.

The Chorus/Flanger Effect

Another function that delivers great effects based on pitch fluctuation is the so-called chorus effect.
Chorus actually consists of a brief delay (generally up to approx. 50 ms) which is varied periodically.
By modulating the delay, the delayed signal is slightly detuned to the input signal (the so-called
Doppler effect). This inconsistency in pitch between the original and effects signal is the source of
the chorus effect. Feedback in the delay line enhances this effect. The left signal side is automati-
cally modulated in a different manner than the right, so a chorus effect is great for converting mono
signals into stereo signals.
If the delay is less than approx. 10 milliseconds, than the effect is called flanging or a flanger effect
rather than chorus. In this case feedback is even more significant because it generates resonances
that can be modulated and is thus yet another source of radical sound effects. If you determine high
feedback values, you can clearly hear how the two sides of the signal are modulated differently - in
reverse phase - by the LFO.
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EDIT > UNISON > MODE
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1 UNISON
Mode
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Twin≤