Korg Soundlink DRS OASYS PCI Patches & Effects Manual page 61

Analog Synths
Filter
Cutoff
0-100. This controls the cutoff frequency of the special 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, Keyboard, and Poly Mod parameters can 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 Envelope control instead.
Resonance
0-100. Resonance emphasizes the frequencies around the cutoff frequency. At 0,
there is no emphasis, and frequencies above the cutoff will simply diminish
smoothly. At very high settings, the resonance can be heard as a separate, whistling
pitch. At medium settings, the resonance will alter the timbre of the filter, but will
not usually be heard as a separate pitch.
Env (Envelope)
0-100. This controls the amount of affect the envelope will have on the filter cutoff
frequency, adding to the setting on the Cutoff knob. At 0, the envelope will have no
affect. At +100, the envelope will open the filter all the way at its peak, even if
Cutoff is set to 0.
Envelope amount affect on cutoff frequency
Keyboard
On, Off. This enables and disables filter tracking of MIDI notes, using a tracking
scale identical to the original synth. Note that you can also modulate any parameter
using the "Key Tracking" modulators in the Mod Palette.
OASYS PCI
+100
0
Pro Synth
53