Hi all - the same 'issue' is there for Tyros and Genos - some of the Organ sounds, such as WhiterShade, are *not* "Organ Flutes" type voices, that is, they don't use the Drawbars and don't have one of the "Rotary" FX as a DSP effect. The "leslie" (rotary speaker) effect is built-in to the sound samples. If you use an "Organ Flutes' type of organ voice, you will have proper "Leslie" speed-up and slow-down. This has been the case since at least Tyros3. I'd say it's a "known situation" and not a bug. . . it would be nice of those other Organ voices had better "Leslie" speed transition, but I think due to the design or how the voice was created, and the fact that it does not use the "Rotary" FX stuff, it doesn't have the gradual slow-down or speed up, on the non-Organ-Flute organ voices. . . .

Jim