The first complete edition of these chorales was published by Breitkopf & Härtel between 1784–1787 in four volumes (view on IMSLP). The first incomplete edition containing 200 chorales in two volumes was published by Birnstiel in 1765 & 1769 (reprinted by Georg Olms, 1975).
This digital edition is referenced against the fourth edition of the chorales by Breitkopf & Härtel, c. 1875: 371 vierstimmige Choralgesänge von Johann Sebastian Bach, 4th ed. by Alfred Dörffel, 178 pp, plate number V.A.10. Re-typeset c. 1915 as Edition Breitkopf 10. Reprinted by Associated Music Publishers, Inc., New York [c. 1940].
The source edition has 371 chorales, but chorale 150 is not a four-part chorale, so it has been removed from this analytic edition. However, chorale numbering is maintained as in the source edition, with file chor150.krn omitted.
All notation on this website is typeset dynamically by the Verovio music engraver, interfaced through the Humdrum notation plugin. If you click on the button above the music for a chorale, it will be loaded into Verovio Humdrum Viewer, where you can listen to and edit the music. Also, check out the chorale typesetter on this website, where you can adjust the layout of a chorale, transpose it, extract parts and then save an SVG image of the notation for use on your own webpage or as a word-processor figure (saving currently not available in Firefox).
These digital scores can also be found as a submodule in the humdrum-data repository.