KDFX Reference
KDFX Algorithm Specifications
10-99
and lowpass filters are then followed by an EQ section with bass and treble shelf filters and two parametric
mid filters.
Figure 10-39 Block diagram of StereoDistort+EQ
StereoDistort + EQ processes the left and right channels separately, though there is only one set of
parameters for both channels. The stereo distortion has only 1 parametric mid filter.
Figure 10-40 Block diagram of MonoDistort + Cab
MonoDistort + Cab is also similar to Mono Distortion except the highpass is replaced by a full speaker
cabinet model. There is also a panner to route the mono signal between left and right outputs. In
MonoDistort + Cab, the distortion is followed by a model of a guitar amplifier cabinet. The model can be
bypassed, or there are 8 presets which were derived from measurments of real cabinets.
The distortion algorithm will soft clip the input signal. The amount of soft clipping depends on how high
the distortion drive parameter is set. Soft clipping means that there is a smooth transition from linear gain
to saturated overdrive. Higher distortion drive settings cause the transition to become progressively
sharper or “harder”. The distortion never produces hard or digital clipping, but it does approach it at high
drive settings. When you increase the distortion drive parameter you are increasing the gain of the
algorithm until the signal reaches saturation. You will have to compensate for increases in drive gain by
reducing the output gain. These algorithm will not digitally clip unless the output gain is over-driven.
Figure 10-41 Input/Output Transfer Characteristic of Soft Clipping at Various Drive Settings
Distortion EQ
Distortion EQ
R Output
L OutputL Input
R Input
L Input
Distortion
Input
Cabinet
Filter
Pan
L Output
R Output
Output
Input
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