Johnsen’s compositions consisted primarily of dramatic functions, opera and ballet, aswell seeing that vocal music and instrumental key pad music. He was amply trained in the usage of German text messages which might indicate his nationwide origin; he is at Sweden portion the courtroom of Adolf Fredrik, next in-line for the Swedish crown, by 1743. He was the organist at St Klara, Stockholm (1745) as well as the queen’s music instructor (1753). The session for courtroom organist emerged in 1763 and by 1771 he previously acceeded to the positioning from the musical movie director from the French-Theatre. Johnsen was a fantastic countrapuntist and improvisation impresario. His popularity was established, nevertheless, with his assortment of delightful songs.