Listen to Piano Concerto, Op. 38: I. Allegro appassionato online. Piano Concerto, Op. 38: I. Allegro appassionato is an Instrumental language song and is sung by Sergei Dorensky, Victor Dubrovsky and Ussr State Symphony Orchestra. Piano Concerto, Op. 38: I. Allegro appassionato, from the album Sergei Dorensky. Rachmaninoff, Gershwin, Barber, was released in the year 2019. The duration of the song is 14:28. Download Instrumental songs online from JioSaavn.