Listen to Piano Trio in G Major, K. 564: III. Allegretto online. Piano Trio in G Major, K. 564: III. Allegretto is an Instrumental language song and is sung by Emil Gilels, Leonid Kogan and Mstislav Rostropovich. Piano Trio in G Major, K. 564: III. Allegretto, from the album Haydn, Mozart & Schumann: Piano Trios, was released in the year 2007. The duration of the song is 5:09. Download Instrumental songs online from JioSaavn.