Listen to Goldberg Variations, BWV 988: Variation 21. Canone alla Settima (1955 Version) online. Goldberg Variations, BWV 988: Variation 21. Canone alla Settima (1955 Version) is an English language song and is sung by Glenn Gould. Goldberg Variations, BWV 988: Variation 21. Canone alla Settima (1955 Version), from the album Glenn Gould plays Bach, was released in the year 2011. The duration of the song is 1:42. Download English songs online from JioSaavn.