Thank you very much for your help. I tried sss / patt / rndPattF16 but without success.
Then I made a patch with sss / patt / rndPattF, sounding but not tame.
Now I will try recycle.axp, that's the idea.
I also prefer a module doing this but I want it to handle a Preenfm2.
Axoloti + Preenfm2 are fantastic.