Medieval music

My thanks to Margo for a wonderfuly detailed response to my query regarding
tuning and the five line staff.

She said:
One source I recommend in my article for a brief statement on medieval
intonation is Mark Lindley's article on "Pythagorean Intonation" in the
_New Grove_.

I had read this article and another of his on JI some years ago and they
seemed rather keyboard oriented. I didn't sense he understood what people
on this list refer to as the difference between adaptive and strict JI. -
of course I might not have the usage correct myself! Anyhow I have had
another look myself after your recommendations and found your reply and web
page clearer. I shall try his book also.

I asked:> Based on available data we can logically infer the relationship
but can
> we assume that Guido (the supposed inventor of the staff) expected his
> students to sing in such a way?

and she replied:

From his divisions of the monochord, and information about organ designs
in this epoch, I would say, "Yes."

I located a translation of Guido's "Micrologus" and he states straight up in
Chapter 1:

"Let him who seeks our training learn some chants copied in our notation,
let him train his hand in the use of the monchord, and let him
frequently ponder these rules . . . Let us see how science, imitating
nature, has given them [the notes] their separate places thereon."

Well, I have a good start.

Cheers

Michael Hugh Dixon