Mads uses norwegian-swedish-english pacenotes, regular 1-6 system with normal additions (one speciality is double "additions": --, ++). Also has own note for 90deg junctions, "vinkel" and hairpin, "hĺrnal". So nothing special there. It's not the world's most precise note system (that title goes to French "Loeb-style degree notes"), but very precise nonetheless. No problems there I would argue.