Bach’s death meant that the Art of Fugue was left unfinished. In his father’s manuscript Carl Philipp Emanuel noted exactly where the last fugue of the Art of Fugue broke off: “While working on this fugue, in which the name BACH appears in the countersubject, the author died.” Our editor Davitt Moroney brings the fugue to a close with 30 supplementary measures.

There has been frequent speculation about what type of scoring would be most appropriate for the piece, particularly since Bach wrote...