When I play jam on the basic track SEQ, and I have enabled REC, then Keystep Pro simultaneously records and plays my recorder track.
When I switch to ARP, then KSP records, but does not play what is recorded. Only after turning off the ARP, you can hear the recorded track.
I think it's an inconsistency in the way you record and ARP doesn't give you the ability to create a live ARP track that you can listen to and modify live at the same time.
Am I doing something wrong? If not, please provide the above functionality. Maybe hold SEQ+ARP together will activate this option?