Thanks for clarifying.
‘MIDI host’ doesn’t exist. The USB protocol has the Host-Device connection concept but the MIDI protocol does not.
Once a USB Host like your laptop or Organelle has hosted a USB Device like Steinberg UR22 or other USB-MIDI adapter like Roland UM-One, you don’t need to worry about USB host-host connections. The UR22 and Roland UM-One will just be sending/receiving MIDI to each other. So as long as you connect a MIDI Out to a MIDI In, you will be fine.
The three USB-MIDI adapters you listed in your first post might work. I would recommend the Roland UM-One since we know from other users that it works well with Organelle1.
So your setup would look like this:
- Laptop USB A port --> Steinberg UR22 USB B port
- Steinberg UR22 MIDI In/Out --> Roland UM-One MIDI Out/In *
- Roland UM-One USB plug --> Organelle USB A port
Note * : if you connect both MIDI Out/In, you may get a MIDI loop unless you disable the output or input in software (either on Ableton or Organelle). Or just don’t connect all the plugs/jacks. So if you wanted to control the Organelle from Ableton, disconnect the Organelle’s MIDI output from the Steinberg. Or you could change the send channel on Organelle…there’s lots of ways to avoid a feedback loop, but sometimes it’s cool: https://youtu.be/h-o35-FoO1w