Jules started his career in music playing the clarinet. He studied with Jan van der Eijnden, Jolle Huckriede, Pierre Woudenberg, Bas de Jong and last but not least Walter Boeykens.
Although he mainly focuses on conducting, he occasionally plays his “old love”. At a concert in the Amsterdam Concertgebouw with the Philips Symphony Orchestra, celebrating the 65th birthday of the State of Israel, he surprised both orchestra and audience by suddenly grabbing his clarinet.