Listen to Symphony No. 6, Op. 79: I. Adagio sostenuto online. Symphony No. 6, Op. 79: I. Adagio sostenuto is an Instrumental language song and is sung by Kirill Kondrashin, Moscow Philharmonic Symphony Orchestra and Moscow Philharmonic Symphony Orchestra. Symphony No. 6, Op. 79: I. Adagio sostenuto, from the album Weinberg: Symphonies Nos. 4 & 6, was released in the year 2005. The duration of the song is 12:44. Download Instrumental songs online from JioSaavn.