Listen to Piano Concerto No. 1 in B-Flat Minor, Op. 23: I. Allegro non troppo e molto maestoso - Allegro con spirito online. Piano Concerto No. 1 in B-Flat Minor, Op. 23: I. Allegro non troppo e molto maestoso - Allegro con spirito is an Instrumental language song and is sung by Emil Gilels. Piano Concerto No. 1 in B-Flat Minor, Op. 23: I. Allegro non troppo e molto maestoso - Allegro con spirito, from the album Tchaikovsky: Piano Concertos, was released in the year 2006. The duration of the song is 20:05. Download Instrumental songs online from JioSaavn.