Kurzweil K2661, Musician’S Reference Manual

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KDFX Reference
KDFX Algorithm Specifications
10-51
Algorithms 150–153: Choruses
150 Chorus 1
151 Chorus 2
152 Dual Chorus 1
153 Dual Chorus 2
One and three tap dual mono choruses
PAUs: 1 for Chorus 1 (both)
2 for Chorus 2 (both)
Chorus is an effect that gives the illusion of multiple voices playing in unison. The effect is achieved by
detuning copies of the original signal and summing the detuned copies back with the original. Low
frequency oscillators (LFOs) are used modulate the positions of output taps from a delay line. The delay
line tap modulation causes the pitch of the signal to shift up and down, producing the required detuning.
The choruses are available as stereo or dual mono. The stereo choruses have the parameters for the left
and right channels ganged.
F
Figure 10-13 Block diagram of left channel of Chorus 2
Right channel is the same.
Dry
Delay
Channel
From Right
Damping
Channel
To Right
High Freq
Feedback
Tap Levels
Wet
L Input
L Output
Chorus 2