Revision
In February 2010 the Bach-Archiv Leipzig and the publisher announced a revision of single volumes, in order to include new sources and findings. The first to be published was the Mass in B minor (updating the second volume of the NBA). Approximately 15 more volumes are planned, including Weimar cantatas (five works), the St John Passion, the motets, the violin sonatas, the cello suites and others.
Read more about this topic: Neue Bach-Ausgabe