Listen to Six 2-Part Inventions - Invention No9 in F Minor, BWV 780 online. Six 2-Part Inventions - Invention No9 in F Minor, BWV 780 is an English language song and is sung by Benjamin Pierce. Six 2-Part Inventions - Invention No9 in F Minor, BWV 780, from the album Pierce Plays Bach, was released in the year 2009. The duration of the song is 1:33. Download English songs online from JioSaavn.