Listen to Piano Trio No. 4 in E Minor, Op. 72: IV. Allegretto non troppo online. Piano Trio No. 4 in E Minor, Op. 72: IV. Allegretto non troppo is an English language song and is sung by Hyperion Trio. Piano Trio No. 4 in E Minor, Op. 72: IV. Allegretto non troppo, from the album Kahn: Complete Piano Trios, was released in the year 2014. The duration of the song is 6:17. Download English songs online from JioSaavn.