Listen to Piano Sonata No. 6 in F Major, Op. 10 No. 2: II. Allegretto online. Piano Sonata No. 6 in F Major, Op. 10 No. 2: II. Allegretto is an Instrumental language song and is sung by Maria Grinberg. Piano Sonata No. 6 in F Major, Op. 10 No. 2: II. Allegretto, from the album Beethoven: Piano Sonatas Nos. 4, 5 & 6, was released in the year 2005. The duration of the song is 4:21. Download Instrumental songs online from JioSaavn.