Genres such as sonata, trio and concerto were initially uncommon in the keyboard music of the early 18th century. Thus it comes as no surprise that many of the pieces in this volume are arrangements by Bach of original compositions and of works by other composers. Next to the Sonatas BWV 525–530 and the Concertos or concerto movements based on pieces by other composers BWV 592–596, the volume also contains the Trio in D minor BWV 583, the Trio settings BWV 585–587 as well as the early versions of BWV 527 and 528. Moreover, eight arrangements of trio movements by Bach made by others are offered online. In his detailed introduction, Pieter Dirksen discusses various aspects of these pieces' origins, inasmuch as they help us better understand the works. The organist will especially welcome the comments on performance practice and registration. It is precisely the fact that these works derive from chamber-music models that leads to individual considerations for each work group.

1. Sonata 1 Es-dur BWV 525
2. Sonata 2 c-moll BWV 526
3. Sonata 3 d-moll BWV 527
4. Sonata 4 e-moll BWV 528
5. Sonata 5 C-dur BWV 529
6. Sonata 6 G-dur BWV 530
7. Trio d-moll BWV 527/1 (Frühfassung)
8. Trio d-moll BWV 528/2 (Frühfassung)
9. Trio d-moll BWV 528/2 (Zwischenfassung)
10. Trio d-moll BWV 583
11. Concerto C-dur (nach A. Vivaldi) BWV 594 12. Concerto d-moll (nach A. Vivaldi) BWV 596 13. Concerto G-dur (nach J. E. v. Sachsen-Weimar) BWV 592
14. Concerto a-moll (nach A. Vivaldi) BWV 593 15. Concerto C-dur (Konzertsatz; nach J. E. v. Sachsen-Weimar) BWV 595
16. Trio c-moll (nach J. Fr. Fasch) BWV 585 (im Anhang)
17. Aria [Trio] F-dur (nach Fr. Couperin) BWV 587 (im Anhang)
18. Trio G-dur (unbekannte Vorlage) BWV 586 (im Anhang)
19. Trio C-dur (nach BWV 1014/3) (online)
20. Trio c-moll (nach BWV 21/1) (online)
21. Trio G-dur (nach BWV 1027/1 bzw. BWV 1039/1) (online)
22. Trio G-dur (nach BWV 1027/2 bzw. BWV 1039/2) (online)
23. Trio G-dur (nach BWV 1027/4 bzw. BWV 1039/4) (online)
24. Trio g-moll (nach BWV 166/2 (BWV 584)) (online)
25. Trio h-moll (nach BWV 790) (online)