It is difficult to find to persons who speak exactly the same way. Classical performances as Oratorio, Opera, Cantata, vary among singers, and conductors. There is a script but this does not make performances identical. Assuming that issuing a declaration can lead to uniformity of performance can be quite unrealistic with all good intentions.
It might be helpful to think of each Greco-Bohairic (GB) & Old Bohairic (OB) as a spectrum of pronunciation.
In GB For example, in real life the letter Theta in GB is pronounced as TH, someitmes S, and occasionally can sound like an F depending on the person pronouncing it, the same with Delta, which can vary from Dh, Z to even S, the same with Ypsilon, the pronounciation can vary from V to F. These may not necessarily be considered errors, but it's how languages vary from their origins to practice. The same applies to Beta where it varies from V to F. These changes are not necessarily intentional, it just happens as people speak.
OB can vary from a person to the other, in its own way. OB is not a snapshot of time, it refers to the traditional authentic way of a spectrum of pronunciation, as traced through various manuscripts.
In short, I think it is futile to seek uniformity of live performance. In addition, to the fact that it is getting unified over GB which is not authentic or scientifically studied. It does not represent the natural development of pronunciation.
Comments
It might be helpful to think of each Greco-Bohairic (GB) & Old Bohairic (OB) as a spectrum of pronunciation.
In GB For example, in real life the letter Theta in GB is pronounced as TH, someitmes S, and occasionally can sound like an F depending on the person pronouncing it, the same with Delta, which can vary from Dh, Z to even S, the same with Ypsilon, the pronounciation can vary from V to F. These may not necessarily be considered errors, but it's how languages vary from their origins to practice. The same applies to Beta where it varies from V to F. These changes are not necessarily intentional, it just happens as people speak.
OB can vary from a person to the other, in its own way. OB is not a snapshot of time, it refers to the traditional authentic way of a spectrum of pronunciation, as traced through various manuscripts.
In short, I think it is futile to seek uniformity of live performance. In addition, to the fact that it is getting unified over GB which is not authentic or scientifically studied. It does not represent the natural development of pronunciation.