Listen to Mozart: Clarinet Concerto in A Major, K. 622: II. Adagio online. Mozart: Clarinet Concerto in A Major, K. 622: II. Adagio is an Unknown language song and is sung by Michael Collins, Russian National Orchestra and Mikhail Pletnev. Mozart: Clarinet Concerto in A Major, K. 622: II. Adagio, from the album 111 More Classic Tracks, was released in the year 2010. The duration of the song is 7:42. Download Unknown songs online from JioSaavn.