Listen to Piano Sonata No. 14 in C Minor, K. 457: I. Molto Allegro online. Piano Sonata No. 14 in C Minor, K. 457: I. Molto Allegro is an English language song and is sung by Carmen Piazzini. Piano Sonata No. 14 in C Minor, K. 457: I. Molto Allegro, from the album Classical Mozart 5, was released in the year 2018. The duration of the song is 6:25. Download English songs online from JioSaavn.