Listen to Horn Concerto No. 1 in D Major, K. 412: I. Allegro online. Horn Concerto No. 1 in D Major, K. 412: I. Allegro is an English language song and is sung by Dennis Brain. Horn Concerto No. 1 in D Major, K. 412: I. Allegro, from the album Essential Composers: Mozart, was released in the year 2013. The duration of the song is 4:37. Download English songs online from JioSaavn.