Listen to Bassoon Concerto No. 4 in F Major, Op. 9: I. Allegro maestoso online. Bassoon Concerto No. 4 in F Major, Op. 9: I. Allegro maestoso is an English language song and is sung by Roco, Carter Pann and Kristin Wolfe Jensen. Bassoon Concerto No. 4 in F Major, Op. 9: I. Allegro maestoso, from the album ROCO in Concert: ROCO Celebrates France, was released in the year 2018. The duration of the song is 10:30. Download English songs online from JioSaavn.