Listen to Piano Sonata No. 17 in B-Flat Major, K. 570: I. Allegro online. Piano Sonata No. 17 in B-Flat Major, K. 570: I. Allegro is an Unknown language song and is sung by Katya Kramer-Lapin. Piano Sonata No. 17 in B-Flat Major, K. 570: I. Allegro, from the album The Best, was released in the year 2023. The duration of the song is 5:45. Download Unknown songs online from JioSaavn.