Listen to I. Allegro - 1 online. I. Allegro - 1 is an English language song and is sung by West Bohemian National Orchestra and Stanislav Bogunia. I. Allegro - 1, from the album 111 Dvorák Masterpieces, was released in the year 2012. The duration of the song is 11:01. Download English songs online from JioSaavn.