Listen to Postlude in C Major, Op. 37: Allegretto grazioso “Waltz for David and Loredana” online. Postlude in C Major, Op. 37: Allegretto grazioso “Waltz for David and Loredana” is an English language song and is sung by Edwin Orion Brownell and The Zara String Quartet. Postlude in C Major, Op. 37: Allegretto grazioso “Waltz for David and Loredana”, from the album The Inside Track, was released in the year 2016. The duration of the song is 2:27. Download English songs online from JioSaavn.