Listen to Symphony No. 5, Op. 55 "Heroic": I. Moderato maestoso online. Symphony No. 5, Op. 55 "Heroic": I. Moderato maestoso is an Instrumental language song and is sung by Gennady Rozhdestvensky, Bolshoi Theatre Orchestra and USSR Ministry of Culture Symphony Orchestra. Symphony No. 5, Op. 55 "Heroic": I. Moderato maestoso, from the album Glazunov: Complete Symphonies, was released in the year 2010. The duration of the song is 12:21. Download Instrumental songs online from JioSaavn.