Listen to Piano Sonata No. 9 in D Major, K. 311: III. Rondo - Allegro online. Piano Sonata No. 9 in D Major, K. 311: III. Rondo - Allegro is an English language song and is sung by Florenzo Marchegiano. Piano Sonata No. 9 in D Major, K. 311: III. Rondo - Allegro, from the album Date Night, was released in the year 2014. The duration of the song is 6:04. Download English songs online from JioSaavn.