I am using a Boss RT-20 rotary pedal with the px-5s. It usually sounds great. I use it with dry organ tones without any DSP rotary effect and it's a ton of fun. But it seems to me that some of the organ tones on the px-5s have a built in rotation that cannot be lifted. Am I just imagining this? If not, is there a way to get it off? Simarly, how do I completely remove the rotary effect from the 9 drawbar organ SS? Any help appreciated.