Listen to Piano Sonata No. 9 in E Major, Op. 14: II. Allegretto online. Piano Sonata No. 9 in E Major, Op. 14: II. Allegretto is an English language song and is sung by Best Study Music Collection. Piano Sonata No. 9 in E Major, Op. 14: II. Allegretto, from the album Bach, Mozart to Effective Study – Classical Music to Study, Clear Mind, Concentration to Study, Learning with Classical Music, was released in the year 2016. The duration of the song is 3:10. Download English songs online from JioSaavn.