BrainModular

A precision about the rack mode.
When I put a rack in rack mode with the rack button, how does the audio goes from one patch to another in the rack ?
Do I have to put audio out and in in each patch and do those then connect automaticaly ? or do I have to work with named audio data busses ?

It's automatic. try it

...but, yes: You have to have "normal" audio in- and outputs for the rack to work - no need for busses.