Hmm I see, so that's indeed the culprit I had in mind...
I tried using line objects to generate a smoother transition between values, seems to kind of do the trick. I tried to implement the gen~ version on the last post of your link, but no luck so far. The funny thing is, it mainly happen with value received from the B Pot.
Midi might be a solution, but I'll loose the interaction with the onboard knobs and CV inputs. Or maybe, if I patch them so that they control the midi parameters ? But I might encounter the same raw data problem
Anyway, thanks for the hints ! If anybody wanna try the kinda working patch, it's here
Other question, is it better to compile pd patches via heavy or pd compiler ? Heavy seems to be way faster