Listen to Cello Concerto No. 1 in A Minor, Op. 33: I. Allegro non troppo online. Cello Concerto No. 1 in A Minor, Op. 33: I. Allegro non troppo is an English language song and is sung by Laszlo Varga. Cello Concerto No. 1 in A Minor, Op. 33: I. Allegro non troppo, from the album Discover Saint-Saens, was released in the year 2014. The duration of the song is 5:26. Download English songs online from JioSaavn.