Korg Soundlink DRS OASYS PCI Patches & Effects Manual page 181

PCM
Pitch Ramp affect on pitch
Pitch Mod
LFO 1
0.0-100.0. This sets the amount by which LFO 1 modulates pitch.
LFO 2
0.0-100.0. This sets the amount by which LFO 2 modulates pitch.
4 Pole Filter
Filter
Cutoff
0-100. This controls the cutoff frequency of the 24dB per octave lowpass filter.
Frequencies above the cutoff are cut, and frequencies below the cutoff are passed
through unchanged.
Generally speaking, the lower the cutoff, the darker the sound; the higher the
cutoff, the brighter the sound.
Note that the Envelope and Key Track parameters also affect the cutoff frequency.
This control has extra smoothing on the DSP, to ensure zipper-free modulation. If
instantaneous modulation is desired (such as modulation via velocity), modulate
the Filter Mod section's Envelope control instead.
OASYS PCI
+12.0
0
-12.0
Time
Xenon 4+
Normal Pitch
173