Listen to Variations on a Theme by Haydn, Op. 56a: Variation VI. Vivace online. Variations on a Theme by Haydn, Op. 56a: Variation VI. Vivace is an Instrumental language song and is sung by Metropolitan Hilarion Alfeyev and Moscow State Academic Symphony Orchestra. Variations on a Theme by Haydn, Op. 56a: Variation VI. Vivace, from the album Brahms: Variations on a Theme by Haydn & Symphony No. 4 (Live), was released in the year 2022. The duration of the song is 1:24. Download Instrumental songs online from JioSaavn.