Listen to Piano Sonata No. 23 in F Minor, Op. 57 - "Appassionata": I. Allegro assai online. Piano Sonata No. 23 in F Minor, Op. 57 - "Appassionata": I. Allegro assai is an English language song and is sung by Wilhelm Kempff and Paul van Kempen. Piano Sonata No. 23 in F Minor, Op. 57 - "Appassionata": I. Allegro assai, from the album Beethoven: Piano Concertos & Appassionata, was released in the year 2010. The duration of the song is 9:45. Download English songs online from JioSaavn.