Listen to Violin Concerto No. 1 in B-Flat Major, K. 207: I. Allegro moderato online. Violin Concerto No. 1 in B-Flat Major, K. 207: I. Allegro moderato is an Instrumental language song and is sung by Oleg Kagan, David Oistrakh and Moscow Philharmonic Orchestra. Violin Concerto No. 1 in B-Flat Major, K. 207: I. Allegro moderato, from the album Mozart: Violin Concertos Nos. 1 & 4, was released in the year 2007. The duration of the song is 6:54. Download Instrumental songs online from JioSaavn.