Kurzweil KDFX, Manual

Page: 89 / 164

Using the Algorithms
Tremolo and AutoPan
5-13
Lo Rate and Hi Rate are the rotation rates of the rotating woofer and tweeter. Each driver
woofer can rotate clockwise or counter-clockwise, which is determined by the sign of this
parameter: assuming the microphones are positioned in front of the driver and the
microphones are panned positively (positive numbers go to the right), then a positive value for
this parameter causes the driver to spin clockwise when viewed from the top. The range is
-10.00 to 10.00 Hz.
Lo Size and Hi Size are the effective sizes (radius of rotation) of the rotating speakers in
millimeters. This affects the amount of Doppler shift or vibrato of the low frequency signal. The
range is 0 to 250 mm.
Lo Trem and Hi Trem control the depth of tremolo (amplitude modulation) of the signals. It is
expressed as a percentage of full scale tremolo. The range is 0 to 100%.
LoResonate and HiResonate are simulations of cabinet resonant modes expressed as a
percentage. For realism, you should use very low settings. The range is 0 to 100%.
Lo Res Dly and Hi Res Dly are the number of samples of delay in each resonator circuit in
addition to the rotation excursion delay. The range is 10 to 2550 samples.
LoResXcurs and HiResXcurs are the number of samples of delay to sweep through the
resonator at the rotation rate of each rotating speaker. The range is 0 to 510 samples.
ResH/LPhs sets the relative phases of the high and low resonators. The angle value in degrees
is somewhat arbitrary and you can expect the effect of this parameter to be rather subtle. The
range is 0 to 360.0 degrees.
Mic Angle is the angle of the virtual microphones in degrees from the ÒfrontÓ of the rotating
speaker. For the left microphone the angle increases clockwise (when viewed from the top),
while for the right microphone the angle increases counter-clockwise. Assigning an FXMod to
this parameter should be done with caution: real-time adjustments to it will result in large
sample skips, which will cause clicks in the signal passing through. The range is 0 to 360.0
degrees. (In
D Rotary only.)
Vibrato/Chorus
The Vibrato/Chorus Algorithm (and also the KB3 Effects Algorithm) simulates the vibrato and
chorus effects on a Hammond organ, and is used in conjunction with the Rotary Speaker. It has
several unique parameters:
VibChInOut is an in/out switch for the Vibrato/Chorus effect.
Vib/Chor is the type of Vibrato/Chorus effect to be used. The choices are from three vibratos,
ÒV1Ó, ÒV2Ó, ÒV3Ó, or three choruses, ÒC1Ó, ÒC2Ó, ÒC3Ó.
Tremolo and AutoPan
Tremolo is amplitude modulation using an LFO. AutoPan moves the signal between the left
and right channels, using an LFO. They have several parameters in common and several
unique ones.
LFO Rate is the rate of the LFO. The range is 0 to 10.00 Hz, or in Tremolo BPM Algorithm, 0 to
12.00 x the tempo.
Rate Scale multiplies the speed of the LFO rate into the audio range. The range is 1 to 25088 x .
When above 16 x , the values increment in semitone steps. When the LFO Rate is set to 1.00 Hz,
the value of this parameter is equal to the LFO frequency in Hertz.