Composer Beatriz Mercedes Ferreyra (1937) was born in Cordoba, Argentina. In 1963 she took a position in the research department of the Office de Radiodiffusion Television Francaise (ORTF), working with the Groupe de Recherches Musicales (GRM) under the direction of Pierre Schaeffer.
She assisted with Henri Chiarucci's and Guy Reibel's Rapport entre la hauteur et la fondamentale d'un son musical, published in 1966 in Revue Internationale d'Audiologie, and Pierre Schaeffer's Solfage de l'Objet Sonore. She also lectured at the Conservatoire National Superieur de Musique de Paris, worked with Bernard Baschet and his Structures Sonores in 1970, and served residencies in electronic music with Dartmouth College in 1976 and in 1998.