LinPlug Organ 3 - Manual (Page 12)

The Spread dial controls the intensity of the polyphonic unison, creating
a sound as if several organs were played simultaneously. Turning the
Spread dial to the right detunes those “imaginary” organs and the sound
of the manual becomes fatter. Spread doesn’t affect the polyphony of
Organ 3 but increases the utilisation of your computer’s CPU.
Note: Pedal can’t make use of the Percussion Section.
LinPlug Organ 3 User Guide Page 12