François Dufrêne has been played on NTS in shows including Songs of Praise, featured first on 23 June 2024. Songs played include Crirythme En Rut.

François Dufrêne was a french poet and plastic artist, considered the younger of the first generation sound poets. A key figure in Nouveau Réalisme (New Realism). In 1946 he adhered to Isidore Isou's "Mouvement Lettriste" and took part in all the manifestations of the movement from 1946 to 1953. In 1953 he created the “Ultralettrisme", a form of electro-acoustic extended vocal technique which he described as "Crirythme" which had no 'score' and existed for recording tape alone. The "Crirythme" explored the voice as a noise source revealing the nonabstracted essence of things much in the tradition of Antonin Artaud's Pour en finir avec le Jugement de Dieu, the brutist orchestras of Dada, and Luigi Russolo's "L'arte dei rumori".