The text you're referring to is the _First Grammatical Treatise_.

Tarrin Wills at the University of Sydney has an excellent page which
includes not only his dissertation on the _First Grammatical
Treatise_ but also a very well-designed course in Old Icelandic.
Unfortunately it doesn't provide much in the way of phonology other
than explaining vowel mutations through their phonological causations.

But in my opinion, trying to pronounce Old Icelandic as it was spoken
1100 years ago is pointless. Languages change. Pronouncing Old
Icelandic with the modern sounds (not so terribly different in any
case) is perfectly acceptable and is even done here in Iceland, where
we speak the language every day. Language is a continuum, not a self-
contained period in time. Think diachronic, not synchronic.

Chad

--- In norse_course@..., Hrimalf <hrimalf@...> wrote:
> Lazurus said (cant get the hang of quoting
> online-sorry!) "would be useful to hear an icelnadic
> radio station..." or words to that effect.
>
> I actually meant I was interested in resurrecting as
> accurately as possible "Viking speech" (Sounds a bit
> melodramatic but you know what I mean) rather than
> using the mutated but similar pronunciation of modern
> icelandic. I think Barnes took his suggestions from a
> medival text on grammer or something? I willn find out
> the name when I find that book again but does anyone
> know anything about this?
>
> Hrimalfr
>
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