The album Never Before Released regroups works from three different sources. Some songs were unpublished and kept only in Messiaen s archives Offrande au Saint Sacrement, Prélude pour Orgue, Chant dans le style Mozart, Quatre Inédits pour Piano et Onde Martenot, and Prélude pour Piano. Some songs were published but never available to the public Monodie, Pièce pour le Tombeau de Dukas, Pièce pour Piano et Quatuor à cordes, and Chant des Déportés. Finally, some songs were published but are no longer available on CD La Mort du Nombre, and Le Merle Noir.
This exceptional recording includes, among others, performances by his wife, Yvonne Loriod-Messiaen, the BBC Choir and Orchestra, Guy Deplus, and is a tribute to a major figure of 20th century contemporary music.