I don't know if it's just my burnt out high freq. hearing, or if you ever drop the Leslie speed back for more variety in the organ? To me it sounds like mostly high speed, and if you are switching to lower speed, I think you are losing some organ volume at that point which makes me think you're on high speed throughout? I just can't pull enough of the hi frequencies to discern if the Leslie speed is changing, and with a Hammond, I sure like to hear the speed modulation a little better.