Heroic chord-punctuated recitative passages alternating with exhilarating episodes. The fugue is known as the "Wedge" because of the increasing intervals in the fugue subject, which look like a wedge on the manuscript paper. Its forward momentum, chromatic interludes and powerful counterpoint are thrilling. Together they constitute one of the most mature masterworks of J.S. Bach which add great stature to the organ repertoire. [13:43]