Listen to 4 Duets: Duet II online. 4 Duets: Duet II is an English language song and is sung by Frank Pelleg, Peter Rybar, Peter Lukas Graf and Winterthur Symphony Orchestra. 4 Duets: Duet II, from the album Pelleg Performs Bach, Mendelssohn, Debussy, was released in the year 2009. The duration of the song is 3:10. Download English songs online from JioSaavn.