Listen to Mozart: Clarinet Concerto in A Major, K. 622: 3. Rondo. Allegro online. Mozart: Clarinet Concerto in A Major, K. 622: 3. Rondo. Allegro is an Unknown language song and is sung by Gervase De Peyer, London Symphony Orchestra and Peter Maag. Mozart: Clarinet Concerto in A Major, K. 622: 3. Rondo. Allegro, from the album Mozart in the Car, was released in the year 2021. The duration of the song is 8:41. Download Unknown songs online from JioSaavn.