Listen to Piano Sonata No. 7 in C Major, K. 309: I. Allegro con spirito online. Piano Sonata No. 7 in C Major, K. 309: I. Allegro con spirito is an English language song and is sung by Baby Lullaby. Piano Sonata No. 7 in C Major, K. 309: I. Allegro con spirito, from the album Classical Baby Songs – Smart Lullabies for Babies, Classic Music of Ludwig van Beethoven & Wolfgang Amadeus Mozart, was released in the year 2017. The duration of the song is 3:41. Download English songs online from JioSaavn.