For many years, Jean-François Madeuf has worked together with a large number of  specialized third parties…

• instrument museums, such as these of the Cité de la Musique in Paris,  the Edinburgh University, the MIM in Brussel, the Historical Music Museum in Basel, the German National Museum in Nürnberg or the MIM in Berlin
• instrument makers such as Graham Nicholson (Den Haag), Rainer Egger (Basel), Markus Raquet (Bamberg), Aron Vajna (Basel) and Michael Münkwitz (Rostock)
• publishers and periodicals such as Musica Rara, Ut-Orpheus, Späth-Schmid, Early Music, la Gazette des Cuivres, Brass Bulletin or Larigot…

… for Researches that he carries through and is now combining for a doctor’s degree at Koninklijk Conservatorium Brussel and Vrije Universiteit Brussel concerning the playing of natural trumpet.