"More complicated," said Wolff, "is the content of the St. Luke Passion," which researchers determined to be entirely spurious, save for one chorus Bach really did compose. Additions include 47 newly-found works excluded from Wolfgang Schmieder's Bach-Werke-Verzeichnis, or BWV, the catalog most musicians and musicologists consider the standard index of J.S. Bach's output.
The German music publisher B‹renreiter has issued the complete collection.