Based on the original versions while taking the latest findings of the Buxtehude research into account. Part 1 (18 preludes), Part 2 (3 toccatas, 1 preambulum, 2 ciacones, 9 canzonas and 3 fugues), Part 3 and 4 contain a total of 48 chorale arrangements in alphabetical order of the initials of the chorales: Part 3 (26 pieces, A-L), Part 4 (22 arrangements, M-W).