Listen to Concerto No. 1 for Piano & Orchestra: Allegro online. Concerto No. 1 for Piano & Orchestra: Allegro is an English language song and is sung by Seattle Symphony. Concerto No. 1 for Piano & Orchestra: Allegro, from the album Orchestral Works, was released in the year 1999. The duration of the song is 10:50. Download English songs online from JioSaavn.