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Before joining the band, he accompanied Noir Désir on tour as a guitar technician. When the bassist, Frédéric Vidalenc, left the group in 1996 to pursue other musical interests, Jean-Paul Roy was naturally chosen as his successor as he was a friend of the group, was able to play both guitar and bass guitar, and knew how to play Noir Désir's songs.
He has played a few songs with Alain Bashung and participated as a bassist on one of the songs of the artist Romain Humeau (who had also written arrangements for the Noir Desir song "Des Visages, Des Figures").
Jean-Paul Roy is one of the organisers of the music festival : Les Rendez-vous de Terres Neuves.