The group may be interested in the note on pronunciation I put on the Resources page of my blog, Let Ancient Voices Speak (http://letancientvoicesspeak.wordpress.com
A Note on Greek Pronunciation
There are several accents used for Ancient Greek: a reconstructed Attic or Classical one, the traditional Erasmian taught in most seminaries and universities, and one based more or less on the Modern Greek pronunciation. From the pedagogical standpoint, there are more disadvantages than advantages to using the first two. The reconstructed Attic attempts a pitch accent, which Classical is supposed to have used. This is possibly correct, but it simply does not sound pleasant when spoken, at least to me. And, it has failed to win much acceptance among teachers of Greek. As for Erasmian (There are several varieties.), there is no evidence it was ever used by native Greek speakers in any period of Ancient Greek. It is completely artificial. Most readings I have heard using it do not sound very fluid, and it does not lend itself well to an approach using living language methodologies. The argument that it helps students distinguish some sounds better fails in that natural languages develop their sound structures to aid communication, not for teaching purposes.
This leaves us with one of the ones based on Modern Greek. This approach has several advantages and few if any disadvantages. First, there is abundant evidence from Greek inscriptions and secular papyri that as early as the 5th century B.C. the distinctive sounds of this pronunciation had already started to develop. We also see this development in some variant readings of early New Testament manuscripts. By the beginning of the 2nd century A.D., the development of this sound system was basically complete. Therefore this accent is certainly ancient, more authentic, and respects the culture of the Greeks more so than the others, in my opinion. There are at present three options: the full Modern Greek system, a modified one used by John Simon in his recording of the Koine NT at GreekNewTestamentAudio (see below), and the Restored Koine of Randall Buth and the Biblical Language Center. Any of these choices just mentioned is preferable to the traditional Erasmian. If the student is allowed a choice of accents in class, by all means use one of these three. You will find that repeated listening to audio done in a Modern accent, combined with speaking practice and reading aloud, will soon help you develop it correctly and if you are not already skilled in it, you can become so fairly rapidly. I personally started doing this back in 2010 after being taught Erasmian in my first Greek studies forty years earlier, and the transition was not that difficult. I highly recommend this choice.
As you see, I do not recommend Erasmian at all, and in the descriptions of resources for audio that follows on the blog, I do not link to any of the existing Erasmian choices.
But having said that, I have always said, "Any spoken Ancient Greek is better than none".
Αs it happens, Marilyn's is the first one I found online when searching for resources for audio years ago. I downloaded it and listened to it some, but just could not get comfortable with it. While I respect the hard work and time spent on it (I understand she was losing her eyesight and did it to be able to keep working with the Greek NT.), I just cannot recommend it for the reasons stated in my note above.