Listen to Piano Concerto No. 1 in B-Flat Minor, Op. 23: I. Allegro non troppo e molto maestoso (Live) online. Piano Concerto No. 1 in B-Flat Minor, Op. 23: I. Allegro non troppo e molto maestoso (Live) is an English language song and is sung by Andrei Gavrilov. Piano Concerto No. 1 in B-Flat Minor, Op. 23: I. Allegro non troppo e molto maestoso (Live), from the album From the History of the Tchaikovsky Competition (Live), was released in the year 2015. The duration of the song is 20:10. Download English songs online from JioSaavn.