Marius Constant (1925-2004) was a French composer and conductor renowned for his contributions to contemporary classical music and electronic music. He was a prominent figure in the post-war avant-garde movement and is celebrated for his innovative approaches to sound. Constant's genre-spanning oeuvre includes orchestral works, chamber music, and electronic compositions. He is particularly known for his work in film music and television, with notable scores including the theme for the French television series "La Planète des hommes" (1965) and contributions to various documentaries and films. One of his significant contributions to music was his role in the development of musique concrète, an experimental genre that utilizes recorded sounds as compositional elements. His collaboration with the Groupe de Recherches Musicales (GRM) further solidified his impact on electronic music. Constant's influence extends to education, as he taught at various institutions, including the Paris Conservatory. His innovative spirit and exploration of new soundscapes helped pave the way for future generations of composers in both acoustic and electronic realms, leaving a lasting legacy in the landscape of contemporary music.