Listen to Piano Concerto No. 1 in B-Flat Minor, Op. 23: I. Allegro non troppo e molto maestoso online. Piano Concerto No. 1 in B-Flat Minor, Op. 23: I. Allegro non troppo e molto maestoso is an Instrumental language song and is sung by Emil Gilels, Kirill Kondrashin and Ussr State Symphony Orchestra. Piano Concerto No. 1 in B-Flat Minor, Op. 23: I. Allegro non troppo e molto maestoso, from the album Emil Gilels 100, Vol. 9 (Live), was released in the year 2016. The duration of the song is 18:58. Download Instrumental songs online from JioSaavn.