I am forever frustrated with HX Stomp USB MIDI. While I have no problems synching from any DAW on my Mac to HX USB MIDI, in spite of every possible idea I can find in my own experiments and on the Internet I can not get the HX Stomp to respond to CC messages on USB, sent from FCB1010. There are zero issues using FCB to HX DIN Midi, and clearly USB MIDI works for tasks sourced directly from the computer.
Furthermore, I don't see CC messages bridged from USB MIDI to DIN MIDI out. Enabling MIDI PASS Through is generally problematic as I see other chained pedals double the tempo when MIDI pass through is on. I can correct the double tempo by disabling MIDI Clock TX when connected to a USB MIDI clock, which is an easy workaround, but USB MIDI CC are still not bridged to DIN MIDI out.
I've spent oodles of time on MIDI routing with Apple MIDI studio and some third party MIDI utilities to narrow that down, but I haven't found a winning combination of mapping out-in-out that will get a USB CC MIDI from FCB1010 DIN MIDI to HX USB MIDI. I've given up and use DIN MIDI, but I come back to this problem when I run into various use cases.
I've tried so many things over the years and hope a software fix or flash of genius will help, but luck and ingenuity are failing! Other than that, I really enjoy the HX and it's made a big impact on enjoyment of my musical hobby! I can't say the same about H9 or other multi-effect pedals, HX Stomp is well designed, sounds great and I love the regular updates.