This is an expression pedals on which is mounted on the cot left a switch that will instantly engage a latral movement of the foot.
The pedals are connected my XK3c Hammond. It controls the volume, and switch
latral control the initiation of Leslie (internal simulation or cabin): On, Slow, Fast, Off.
If Leslie is not running, one short of the cross, and she lied to slow, one short blast, and it gets faster. A long stops the Leslie, and if you did while you Tiez in "fast", two short blasts can put the Leslie directly with fast speed.