Can't get control back to MIDI Translator

Thank you very much for your penultimate reply. I will work on that this evening.

To your latest comment: This apparent loop back is intentional and worked well all the time. It carries back the program change initiated by the Boom Box to the Numa.

The real reason why I’m going back to revising my Translator project is that I want to get rid of the Midihub altogether and do everything in the Bome Box, in a manner that I have outlined in the attached chart. So I first want to achieve a state where everything works through the open Translator Program as before, and then work on the new design without the Midihub and possibly without any MIDI DIN connections at all.

In principle, would it be possible to use just the USB port of the Bome Box, or is it mandatory to use the MIDI DIN ports?

New Configuration.pdf (268.4 KB)