Kurzweil K2661, Musician’S Reference Manual

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KDFX Reference
KDFX Algorithm Specifications
10-53
Chorus 1 uses just 1 unit allocation and has one delay tap. Figure 10-15 is a simpli fi ed block diagram of the
left channel of Chorus 1.
Figure 10-16 Block diagram of left channel of Dual Chorus 1 (right channel is similar)
The left and right channels pass through their own chorus blocks and there may be cross-coupling
between the channels. For Chorus 2 and Dual Chorus 2, each channel has three moving taps which are
summed, while Chorus 1 and Dual Chorus 2 have one moving tap for both channels. For the dual mono
choruses you can pan the taps to left or right. The summed taps (or the single tap of Chorus 1) is used for
the wet output signal. The summed tap outputs, weighted by their level controls, are used for feedback
back to the delay line input. The input and feedback signals go through a one pole lowpass
fi lter (HF
Damping) before going entering the delay line.
The Wet/Dry control is an equal power crossfade. Note that the Output Gain parameters affects both wet
and dry signals.
For each of the LFO tapped delay lines, you may set the tap levels, the left/right pan position, delays of the
modulating delay lines, the rates of the LFO cycles, and the maximum depths of the pitch detuning. The
LFOs detune the pitch of signal copies above
and below the original pitch. The depth units are in cents, and
there are 100 cents in a semitone.
From Right
Channel
To Right
Channel
Dry
Feedback
Tap Level Wet
Wet
From Right
Pans
To Right
Output Sum
High Freq
Damping
Delay
Pan
L Input
L Output