Listen to Flute Concerto in G Major, TWV 51:G1: II. Allegro online. Flute Concerto in G Major, TWV 51:G1: II. Allegro is an English language song and is sung by Karl Kaiser. Flute Concerto in G Major, TWV 51:G1: II. Allegro, from the album Telemann: The Complete Wind Concertos, was released in the year 2015. The duration of the song is 3:25. Download English songs online from JioSaavn.