ART Pro Audio Quadra/Fx - Two Channel Effects Processor - Manual (Page 45)

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CHORUS
Chorus is an effect that mixes a signal with slightly detuned copies to
produce a rich, moving texture. The Low Frequency Oscillator (LFO) Speed
determines the movement (sweep) rate and the LFO Shape determines the
sweep pattern. Some of the chorus classes have dynamics sensing, which
can use input level to switch the effect in and out or trigger the LFO.
NOTE: The chorus effect is strongest when Mix is set to 50.
CHORUS CLASSES:
Vocal
The Vocal Chorus is the traditional, late 70’s chorus effect (like the MXR Yellow Chorus) with the addition of
dynamics sensing, which can be used to fade the effect in and out when the Threshold level is crossed.
Threshold is set with the Special parameter and Decay sets the effect’s fade times.
Instrument
An Instrument Chorus recreates the sound of the classic jazz amp chorus. Bandwidth and LFO parameters
are controlled to produce the characteristic sound and control action. For example, as LFO Speed is
increased, Width is automatically adjusted within a musical range.
Concert
The Concert Chorus creates a high-end, studio chorus. It’s the full-blown effect with extended bandwidth and
less linking between LFO Width and Speed.
Gated
The Gated Chorus is the Instrument effect with the addition of dynamics sensing, which can be used to duck
the effect in and out depending on the Threshold level. Threshold is set with the Special parameter.
Ambient
The Ambient Chorus is a “spatial” effect that can chorus the difference information in a stereo mix. Difference
information is the part of a mix that does not occur equally in both of the stereo channels, often such as
guitars, backing vocals, and reverb tails. Instruments like lead vocals, bass, and some drums are often mixed
to the center, creating the common information (common between the left and right channels). This algorithm
processes either the difference information or the full mix (consisting of both difference and common
information), depending on the Difference Factor setting (see the Special parameter below). Try Factory
Preset #58 with your favorite CDs and then on your own stereo tracks or mixes. Due to its stereo nature, this
class is not available in Discrete 4 routing.