Listen to Variations on a Theme by Haydn, Op. 56: Variation 6. Vivace online. Variations on a Theme by Haydn, Op. 56: Variation 6. Vivace is an English language song and is sung by Zdeněk Košler and Janáček Philharmonic Orchestra. Variations on a Theme by Haydn, Op. 56: Variation 6. Vivace, from the album Brahms: Variations on a Theme by Haydn - Academic Festival Overture - Tragic Overture, was released in the year 2009. The duration of the song is 3:10. Download English songs online from JioSaavn.