Listen to Symphony No. 9 in C Major, K. 73: IV. Molto allegro online. Symphony No. 9 in C Major, K. 73: IV. Molto allegro is an English language song and is sung by Northern Chamber Orchestra. Symphony No. 9 in C Major, K. 73: IV. Molto allegro, from the album Mozart: Complete Symphonies, was released in the year 2013. The duration of the song is 2:16. Download English songs online from JioSaavn.