Display Moreto me it looks like the Airstep is creating a MIDI loop via USB then... or maybe something goes wrong with the USB enumeration.
On another thread a user reports that an Airstep lite firmware was needed to get it going :
So it seems to me the Airstep has firmware issues.
Unfortunately it's not feasible for us to debug all possible external non-Kemper gear problems.
It would help if we would get a so called 'USB descriptor dump' from your Airstep.
How can I get the descriptor dump?
I will send it to you or post here.
On other note:
Are there any MIDI controllers that work OK?
List of tested and recommended brands and models?
I want to add 4+ button footswitch that could be programmed to select rigs, or even toggle between 2 rigs.