Listen to Symphony No. 6 in D Minor, Op. 104: I. Allegro molto moderato online. Symphony No. 6 in D Minor, Op. 104: I. Allegro molto moderato is an Instrumental language song and is sung by Gennady Rozhdestvensky and Grand Symphony Orchestra of All-Union National Radio Service and Central Television Networks. Symphony No. 6 in D Minor, Op. 104: I. Allegro molto moderato, from the album Sibelius: Symphonies, was released in the year 2010. The duration of the song is 9:52. Download Instrumental songs online from JioSaavn.