But that again is just a convention, and before western music converged on some kind of well tempered or chromatic tunings, there were quite some experiments wi

But that again is just a convention, and before western music converged on some kind of well tempered or chromatic tunings, there were quite some experiments with keyboards featuring both flat and sharp keys, see http://de.wikipedia.org/w/index.php?title=Datei:Cembalo_universale_Tastatur.JPG&filetimestamp=20111014032521 http://de.wikipedia.org/w/index.php?title=Datei:Cembalo_univ... or http://en.wikipedia.org/wiki/Archicembalo http://en.wikipedia.org/wiki/Archicembalo