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 Mikhail Pletnev, Vladimir Fedoseyev and Grand Symphony Orchestra of All-Union National Radio Service and Central Television Networks. Piano Concerto No. 1 in B-Flat Minor, Op. 23: I. Allegro non troppo e molto maestoso, from the album Tchaikovsky: Concertos & Concertante Pieces, was released in the year 2020. The duration of the song is 21:32. Download Instrumental songs online from JioSaavn.