There's a recording of the WTC by Richard Egarr that uses the tuning system derived by Bradley Lehman from the squiggles on the cover-page of the WTC manuscript

There's a recording of the WTC by Richard Egarr that uses the tuning system derived by Bradley Lehman from the squiggles on the cover-page of the WTC manuscript. (See http://www.larips.com/ http://www.larips.com/ for more about that.) It sounds pretty good to me, though I'm far from being an expert. (Caveat: Some but not all listeners, of whom I am one, hear an annoying mains-hum-like sound on the Egarr CDs. I don't know whether it's a thing that affects some CDs but not others, or whether it's filtered out by some reproduction equipment but not all, or what.)