Listen to Piano Trio in E-Flat Major, Op. 1 No. 1: I. Allegro online. Piano Trio in E-Flat Major, Op. 1 No. 1: I. Allegro is an Instrumental language song and is sung by Igor Zhukov, Grigory Feigin and Valentin Feigin. Piano Trio in E-Flat Major, Op. 1 No. 1: I. Allegro, from the album Beethoven: Piano Trios, was released in the year 2016. The duration of the song is 9:38. Download Instrumental songs online from JioSaavn.