Bach’s major organ Preludes & Fugues are among the most difficult works written for the instrument. They were likely written for recital rather than liturgical use, and for practical reasons were probably usually practiced at home on pedal harpsichord and pedal clavichord rather than in church. Within the Bach household there was also a tradition of composing for pairs of keyboards, and this edition presents arrangments of eight organ Preludes & Fugues for keyboard duo (harpsichords, clavichords, organs or pianos), turning virtuoso solo works into more approachable chamber music repertoire. The arrangements have been made from the best surviving manuscript and printed sources, and full advantage has been taken of the possibilities of dialogue between two instruments.