LinPlug Organ 3 - Manual (Page 25)

Rotary
The „Rotary“ effect simulates the sound of a Leslie Speaker Cabinet.
The original Leslie speakers that usually accompanied the B3 consisted
of a single cabinet containing two speakers, one for the higher frequen-
cies and one for the lower frequencies. Both speakers were mounted on
a separate motor that rotated the speaker at two speeds; slow and fast
(the speaker could also be stopped). Organ 3's rotary speaker simulation
enables you to control a wide range of speaker parameters including the
slow and fast speed settings, as well as the motor acceleration settings
and the crossover frequency of the low and high frequency speakers.
The Rotary effect contains three basic functions, which are controlled by
the buttons to the left of the effect’s dials.
on/off: starts and stops the rotation of the Leslie’s speakers. This
function is NOT identical with the on/off buttons to the right of the effect
type! These buttons switch the signal processing on and off, while the
on/off of the Leslie cause the speakers to start or stop rotating.
SLO: sets the speaker rotation to the slow speed settings.
LinPlug Organ 3 User Guide Page 25