Listen to Piano Trio in E-Flat Major, WoO 38: I. Allegro moderato online. Piano Trio in E-Flat Major, WoO 38: I. Allegro moderato is an Instrumental language song and is sung by Igor Zhukov, Grigory Feigin and Valentin Feigin. Piano Trio in E-Flat Major, WoO 38: I. Allegro moderato, from the album Beethoven: Piano Trios, was released in the year 2016. The duration of the song is 4:23. Download Instrumental songs online from JioSaavn.