Listen to So Long Farewell (From "The Sound of Music") online. So Long Farewell (From "The Sound of Music") is an English language song and is sung by The Von Trapp Children. So Long Farewell (From "The Sound of Music"), from the album Greatest Musicals Double Feature - The King and I & The Sound of Music (Original Film Soundtracks), was released in the year 2014. The duration of the song is 2:53. Download English songs online from JioSaavn.