Korg Soundlink DRS OASYS PCI Patches & Effects Manual page 32

Analog Bass-Lead
Filter
Cutoff
0-100. This controls the cutoff frequency of the 12dB 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 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.
Envelope
+/- 100. The ADSR envelope can be used to control the filter cutoff frequency,
adding to or subtracting from the setting on the Cutoff knob. With positive
envelope amounts, the envelope will increase the cutoff frequency above the setting
on the Cutoff knob. With negative amounts, the envelope will act as if it is inverted,
decreasing the cutoff frequency below 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. At -100, the envelope will close the
filter all the way down at its peak, even if the Cutoff is set to 100.
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Analog Synths
OASYS PCI