Listen to Piano Concerto No. 4 in B-Flat Major, Op. 53: III. Moderato online. Piano Concerto No. 4 in B-Flat Major, Op. 53: III. Moderato is an Instrumental language song and is sung by Victoria Postnikova, Gennady Rozhdestvensky and USSR Ministry of Culture Symphony Orchestra. Piano Concerto No. 4 in B-Flat Major, Op. 53: III. Moderato, from the album Prokofiev: Concertos Nos. 1, 4 & 5, was released in the year 1991. The duration of the song is 7:42. Download Instrumental songs online from JioSaavn.