Fast and slow mutes all sound. Off, chorus, delay OK. Nothing in effects edit seemed changed. As a matter of fact, what changes the values from 64. I mean what controller.
Nevermind, I finally open'd drawbar window, and then it worked.
The Chorus, delay, disto , and leslie fast and slow are linked to the FX2 knob on every track (the green one)
I think the leslie effect is placed serial in the audio chain on the Ketron SD2 engine. So if the FX level is at 0, the sound is getting OFF.
You can enjoy thoses drawbars sounds, and even assign your Axiom sliders to the drawbars. :)
Dan