Leslie speaker effect
I have an organ score in which I would like to add a fast and slow Leslie speaker effect at selected sections. For the score itself a staff text for "Leslie fast" or "Leslie slow" is sufficient, but if possible I would like it to play back with the effect simulated. Is there any way to do this? I tried tremolo but it sounds terrible. It's not really a tremolo but rather a rapid switching on and off of the notes.