KDFX Reference
KDFX Algorithm Specifications
10-85
720 MonoPitcher+Chor
721 MonoPitcher+Flan
Mono pitcher algorithm (filter with harmonically related resonant peaks) with a chorus or flanger
PAUs: 2 each
The mono pitcher algorithm applies a Þlter which has a series of peaks in the frequency response to the
input signal. The peaks may be adjusted so that their frequencies are all multiples of a selectable frequency,
all the way up to 24 kHz. When applied to a sound with a noise-like spectrum (white noise, with a ßat
spectrum, or cymbals, with a very dense spectrum of many individual components), an output is
produced which sounds very pitched, since most of its spectral energy ends up concentrated around
multiples of a fundamental frequency.
The graphs below show Pt PkSplit going from 0% to 100%, for a Pt Pitch of 1 khz (approx. C6), and Pt
PkShape set to 0.
Figure 10-32 Response of Pitcher with different PkSplit settings. Pitch is C6 and PkShape is 0.
Note that a Pt PkSplit of 100% gives only odd multiples of a fundamental that is one octave down from no
splitting. The presence of only odd multiples will produce a hollow sort of sound, like a square wave
(which also only has odd harmonics.) Curiously enough, at a Pt PkSplit of 50% we also get odd multiples
of a frequency that is now two octaves below the original Pitch parameter. In general, most values of
PkSplit will give peak positions that are not harmonically related.
PeakShape = 0
PeakSplit = 0%
Khz
dB
PeakShape = 0
PeakSplit = 25%
Khz
dB
PeakShape = 0
PeakSplit = 50%
Khz
dB
PeakShape = 0
peakSplit = 75%
Khz
dB
PeakShape = 0
PeakSplit = 100%
Khz
dB
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