Only have had my new Kemper Rack up for about an hour, slowly finding my way around.
It seems there are dedicated positions for volume and wah pedals, and I have just one, a Roland EV5. On the AX FX, you could use the onscreen editor software on the Mac to choose the WAH or VOL source, which was in my case EXP pedal one input, as it is now on the Kemper. I would simply switch between them as needed.
I THINK you can do this on the Kemper from what I'm reading, by going in to SYSTEM settings and switching it as needed as well, but when I press SYSTEM SETTINGS I page all the way to PEDAL 1, but at that point have no idea what to press to set it at WAH. No buttons seem to do anything?
Any help appreciated!