Hi @riban, thanks for your inputs!
I have tried these snapshots, but sadly they are only saving the configuration done through Zynthian inputs. When I manually “hack” the jack routing matrix to be able to achieve my result and that I save this, the snapshot is then unusable and crash when I try to load it.
Another point that I have seen is that I never managed to have different sounds for different inputs. I have seen this thread a bit related: How to play 2 different synths simultaneously
But there seems to be no native way to play on jack routing. From what I have understood yet, Zynthian takes all inputs and put them in the ZynMidiRouter, and might only be able to produce different sound based on different midi inputs channels.
I will post after a picture of how I have modelized a generic setup to discuss about its feasibility / ways to achieve it / develop Zynthian to be able to do so through its UI.
But again maybe there are concepts / designs considerations that I might have not understood that may solve my needs? 