Kurzweil K2661, Musician’S Reference Manual

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KDFX Reference
KDFX Algorithm Specifications
10-81
Since these effects have 2 taps per channel, control over 4 LFOs is necessary with a minimum number of
user parameters (Figure 2). This is accomplished by offering 2 sets of LFO controls with three user
interface modes: Dual1Tap, Link1Tap, or Link2Tap. These are selectable with the LFO cfg parameter and
affect the functionality of the 2 sets of rate, depth and delay controls (and also phase and feedback controls
for the
fl ange). Each parameter is labeled with a 1 or a 2 in the parameter name to indicate to which control
set it belongs. Control set 1 consists of controls whose name ends with a 1, and control set 2 consists of
controls whose name ends with a 2.
In Dual1Tap mode (Figure 3), each control set independently controls 1 tap in each channel. This is useful
for dual mono applications where separate control over left and right channels is desired. Control set 1
controls the left channel, and control set 2 controls the right channel. The second pair of moving delay taps
are disabled in this mode. LRPhase is unpredictable unless both rates are set to the same speed. Then, the
phase value is accurate only after the LFOs are reset. LFOs can be reset by either changing the LFO cfg
parameter, or loading in the algorithm by selecting a preset or studio that uses it. For user-friendly
LRPhase control, use either the Link1Tap or Link2Tap modes.
In Link1Tap mode (Figure 4), control set 1 controls 1 tap in both the left and right channels. Control set 2
has no affect, and the second pair of LFO delay taps are disabled. This mode is optimized for an accurate
LRPhase relationship between the left and right LFOs.
In Link2Tap mode (Figure 5), control set 1 controls the fi rst left and right pair of LFOs, while control set 2
controls the second pair. This mode uses all 4 LFOs for a richer sound, and is optimized for LRPhase
relationships. Each of the 2 taps per channel are summed together at the output, and the Fdbk parameters
control the sum of both LFO taps on each channel fed back to the input.
In addition to the LFO delay taps, the fl ange offers a static delay tap for creating through-zero fl ange
effects. The maximum delay time for this tap is 230ms and is controlled by the Fl StatDly parameter. Its
feedback amount is controlled by the Fl StatFB. Separate mix levels for the LFO taps and the static tap are