Korg Soundlink DRS OASYS PCI Patches & Effects Manual page 96

Tonewheel Organ
Attack
0-100. This controls the attack time of the percussion. See also the Width parameter,
below, which controls the overall duration of the percussion.
Decay
0-100. This controls the decay time of the percussion.
Width
0-100. This controls the total duration of the percussion. If the width is set to a small
value, and the attack is set to a large value, you may not hear the percussion at all.
Volume
0-100. This controls the output volume of the entire organ. You might wish to
modulate this with a foot pedal.
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Organ
OASYS PCI