I haven't gone further yet to hook up a midi device however, my initial test looks encouraging enough to me to keep me motivated towards my goal. I can now see the AMT8 in the midi devices config window and can enable/disable ports. Amazingly, to my surprise and joy, it looks as though there may be light at the end of this tunnel? Recently, I've been testing out the Linux pre alpha builds of Reaper on a Raspberry Pi 3b+.
Its been awhile since I put any energy into this thread re the AMT8 and nearly a year ago you offered a case of beer if I could get it working?