thank you very very much for helping!!! You are completely right!!! As I checked the PF functions at home, I did not play very loud and the regular pitch I was hearing, came from the guitar acoustically and not from the PF. Now I look like a complete idiot ;-))) but on the other hand I am glad that my PF has not to be repaired 😉
I now use the bass preset (Octave down) for jam/loop tracks, it sounds very good and I don't have to get a bass (player 😉
So, thanks again for checking things and sending your posts!!!