Listen to Agon: XV. Four Duos online. Agon: XV. Four Duos is an Instrumental language song and is sung by Yevgeny Mravinsky and Leningrad Philharmonic Symphony Orchestra. Agon: XV. Four Duos, from the album Debussy: Prélude à l'après-midi d'un faune - Bartok: Music for Strings, Percussion and Celesta - Stravinsky: Agon (Live), was released in the year 2005. The duration of the song is 0:33. Download Instrumental songs online from JioSaavn.