I got an Apogee Jam-x to use as part of my mobile set-up (Ipad mini 5, Tx-6, Op-1), and was pretty bummed out when I figured out that the Jam-x has to be connected to the Ipad mini through the USB-C port in order to work. BUT, it also works when connected via USB-C to the Op-1! Super stoked when I found that out and wanted to share in case anyone else was wondering.