Since 1986, he is invited saxophonist in the Ensemble Intercontemporain, he also appears as soloist with the most prestigious orchestras (London BBC, Radio France, Radio of Finland, WDR Köln, Berlin Philharmonic, Kioi Tokyo). Passionate for his instrument, he goes beyond the work of the soloist and frequents the Musical Acoustic Laboratories of the University of Paris 8. The results of his research on specific acoustics of the saxophone will be for him a precious asset in his collaboration with composers. After obtaining several outstanding Premiers Prix at the Conservatoire National Supérieur de Musique of Paris, Claude Delangle was appointed professor in 1988, where he has created the most prestigious saxophone class in the world. Pupils of all nationalities long to receive this education, which combines concerts with the possibility of studying with important composers and offers a large range of interdisciplinary activities. In Europe, North America, South America, Australia and Asia, Claude Delangle is requested for interpretation courses.

He joins Henri SELMER Paris in 1989 and helps design the Series III range. He is today one of the main artistic advisor for the saxophone development.

He is currently in charge of a collection publishing new repertoires or republishing classic works, not forgetting, however, publication of pedagogical works.