Listen to Clarinet Concerto No. 1 In D Major, K. 412: - I. Allegro online. Clarinet Concerto No. 1 In D Major, K. 412: - I. Allegro is an Unknown language song and is sung by Recommend Classic. Clarinet Concerto No. 1 In D Major, K. 412: - I. Allegro, from the album Classical Music Best For Teens 7, was released in the year 2018. The duration of the song is 1:55. Download Unknown songs online from JioSaavn.