The only point that is arguable really is the pronounciation of Β,Γ,Δ as b,d and g respectively. That they must have been originally pronounced as such, it would seem undeniable to one trained in comparative linguistics: words of the same roots in related languages have them. Now as to when the shift started: first it might have not been universal at the beginning; I recall that there is an inscription from Boiotia (could be wrong, its been years since I studied those things) that has an interesting spelling mistake: it presents a digamma where a beta should have been. If the scribe made such a mistake it might lead us to think that the digamma (presumably pronounced as "v") and the beta sounded the same (spelling mistakes and mistakes in general are our friends, seriously, don't correct people in the way they talk or write, future linguists will thank us for this). Now iirc this inscription dates from sometime in the 4th cent BC. But again it would only prove that Greek as spoken in a particular place was moving towards the shift in question, towards a softer pronounciation of Β,Γ,Δ. It would certainly be rash to claim that this proves a universal tendency in Greek. And again all this concerns one of the three letters in question. Evidence for when the pronounciation shift of these is very hard to come by. What I can say, is that to my knowledge, Latin never rendered Greek B in borrowed words (and there were a lot around the 1st and 2nd cent AD) as anything else than b, at a time when the Latin V must have sounded like v today, that is the exact sound of the modern Greek pronounciation of beta. Why would this have been so at this point in time if B did not still sound like b?
Bookmarks