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 Peter Toperczer, Slovak Philharmonic Orchestra and Bystrik Rezucha. Piano Concerto No. 1 in B-Flat Minor, Op. 23: I. Allegro non troppo e molto maestoso - Allegro con spirito, from the album 111 Tchaikovsky Masterpieces, was released in the year 2012. The duration of the song is 20:17. Download Instrumental songs online from JioSaavn.