Well, I’m giving up for now. Maybe a future release of live and/or max might help.
How far did I get ? Well, I have installed liveosc (which needs python) and loopBe1, and managed to get midi from ianniX into live! Not bad, but I really wanted osc input.
Max upreceive does not seem to function within live – even with liveosc installed. It is possbile to run an external max patch, to convert osc to midi.