I have the original. There is no typo in the Latin, but I don't know who provided the translation (I had a different one in my first draft of this article in 2006).  That's before we were doing inline cites so I'm not even sure what source I was using (Reese?).  My CD liner notes give "These verses which you hear, set in chromatic style", which isn't intended to be literal.  Feel free to change the translation to a correct one.  (talk)