Listen to Flute Concerto No. 1 in G Major, K. 313: I. Allegro maestoso online. Flute Concerto No. 1 in G Major, K. 313: I. Allegro maestoso is an Unknown language song and is sung by Renee Siebert, Wurttemberg Chamber Orchestra Heilbronn and Jörg Faerber. Flute Concerto No. 1 in G Major, K. 313: I. Allegro maestoso, from the album Autobahn Classics, Vol. 10 (Classical Music Remastered for a Noisy Environment), was released in the year 2014. The duration of the song is 9:11. Download Unknown songs online from JioSaavn.