Listen to Symphony No. 40 in G Minor, K. 550: I. Molto allegro online. Symphony No. 40 in G Minor, K. 550: I. Molto allegro is an English language song and is sung by London Symphony Orchestra and Leopold Ludwig. Symphony No. 40 in G Minor, K. 550: I. Molto allegro, from the album Classical Music for Beginners: A Dummies Introduction to Classical Music, was released in the year 2014. The duration of the song is 3:18. Download English songs online from JioSaavn.