Ironically, the six-voice Ricercar from Das Musikalisches Opfer, included here, is named by tuning specialist Mark Lindley as a piece that works “best” in Equal Temperament. See his article, “Temperaments,” in Oxford Composer Companions: J. S Bach, ed. Malcolm Boyd (Oxford, 1999), p. 476. The performance comparison between ET and extended sixth-comma meantone should therefore be of special interest for this work.