Listen to Variations Diabelli, Op. 120: Variation I. Alla marcia maestoso online. Variations Diabelli, Op. 120: Variation I. Alla marcia maestoso is an English language song and is sung by Ferenc Vizi. Variations Diabelli, Op. 120: Variation I. Alla marcia maestoso, from the album Beethoven, was released in the year 2015. The duration of the song is 1:40. Download English songs online from JioSaavn.