Kurzweil K2661, Musician’S Reference Manual

Page: 148 / 500

10-66
KDFX Reference
KDFX Algorithm Specifications
instead of addition by setting Wet/Dry to -50%, then the notches become peaks and the peaks become
notches.
Figure 10-23 Response of typical phaser with (i) Wet/Dry = 50% and (ii) WetDry = -50%.
Some of the phaser algorithms have feedback. When feedback is used, it can greatly exaggerate the peaks
and notches, producing a much more resonant sound.
LFO Phasor is a simple phaser algorithm with Wet/Dry and Fdbk Level parameters. Two LFOs are built in
to control the
fi lter frequency and the depth of the resulting notch. You can control the depths, rates, and
phases of both the LFOs. The algorithm is stereo so the relative phases of the LFOs for the left and right
channels can be set. When setting the LFO which controls the
fi lter frequency, you speci fi y the center
frequency around which the LFO will modulate and the depth of the LFO. The depth speci fi es how many
cents (hundredths of a semitone) to move the fi lter frequency up and down. The NotchDepth parameter
provides an alternative way of combining wet and dry phaser signals to produce a notch. In this case the
parameter speci
fi es the depth of the notch in decibels (dB). The depth of the notch can be modulated with
the notch LFO. The notch LFO is completely independent of the frequency LFO. The rates of the LFOs may
be different. The relative phases of the notch and frequency LFOs (N/F Phase) only has meaning when the
LFOs are running at the same rate. As with all KDFX LFO phases, it is not a recommended to directly
modulate the phase settings with an FXMod.
SingleLFO Phaser is identical to LFO Phaser except that the notch and frequency LFOs always run at the
same rate.
As mentioned earlier, Manual Phaser leaves the phaser motion up to you, so it has no built in LFOs.
Manual Phaser has a Notch/BP parameter which produces a complete notch at the center frequency when
Wet/Dry is set to -100% and a resonant bandpass when set to 100%. At 0% the signal is dry. To get phaser
motion, you have to change the
fi lter center frequencies (left and right channels) yourself. The best way to
do this is with an FXMod. There are also feedback parameters for the left and right channels.
LFO Phaser Twin produces a pair of notches separated by a spectral peak. The center frequency parameter
sets the frequency of the center peak. Like LFO Phaser, the
fi lter frequency can be modulated with a built
in LFO. The Notch/Dry parameter produces a pair of notches when set to 100%. The output signal is dry
0 dB
-20
-40
Freq
10 Hz 100 1000 10k
Gain
0 dB
-20
-40
Freq
10 Hz 100 1000 10k
Gain
(i) (ii)