Listen to Piano Sonata No. 7 in B-Flat Major, Op. 83: I. Allegro inquieto online. Piano Sonata No. 7 in B-Flat Major, Op. 83: I. Allegro inquieto is an Instrumental language song and is sung by Alexei Sultanov. Piano Sonata No. 7 in B-Flat Major, Op. 83: I. Allegro inquieto, from the album Prokofiev : Instrumental & Chamber Music [Prokofiev Edition Vol.4], was released in the year 2003. The duration of the song is 8:29. Download Instrumental songs online from JioSaavn.