Listen to Goldberg Variations, BWV 988: Variation 9. Canone alla Terza. a 1 Clav. (1955 Version) online. Goldberg Variations, BWV 988: Variation 9. Canone alla Terza. a 1 Clav. (1955 Version) is an English language song and is sung by Glenn Gould. Goldberg Variations, BWV 988: Variation 9. Canone alla Terza. a 1 Clav. (1955 Version), from the album Glenn Gould plays Bach, was released in the year 2011. The duration of the song is 0:38. Download English songs online from JioSaavn.