LinPlug Organ 3 - Manual (Page 27)

An example for acceleration settings:
If “lo accel” is set to 1/1, “hi accel” to ½ and you switch the speed of
Rotary from slow to fast, the acceleration of the low frequency speaker
will take one note (4 beats in a 4/4 bar) to reach the fast speed, while the
acceleration of the high frequency speaker will take a half-note (2 beats
in a 4/4 bar).
And now....“pulling out all the stops” of the Rotary:
As the speed settings are also sync-able, you could change the speed of
a 1/16-note-synced tempo to an ¼-note-synced tempo in the duration of
a ½ note. Give it a try! The sound of such a precise working Rotary is
absolute fantastic and Organ 3 is the very first organ providing such a
Rotary effect!
NOTE: When using ECS to automate the Slow/Fast switch make
sure to use a “Switch” type Controller to actually switch between
Fast and Slow using the Acceleration parameter. If you apply a
“Continuous” type Controller like a dial or slider, the speed will
adjust exactly as you move the Controller (ignorning the
Acceleration parameter)!
LinPlug Organ 3 User Guide Page 27