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 Power of Positive Thinking. Piano Sonata No. 9 in E Major, Op. 14: II. Allegretto, from the album Speed Learning – Songs to Work, Study Sounds, Fast Concentration, Music for Listening and Reading, was released in the year 2016. The duration of the song is 3:10. Download English songs online from JioSaavn.