I do understand your basic premise and the legitimate rationales behind it, and think that, in general, you are correct. The in general, though, is the key word here. Indeed, one should not sing anything at liturgy in a manner that is self consciously eccentric with respect to educated norms, for doing so calls attention to the musical item itself rather than to its role and import in the liturgical continuum....classicists are irrelevant...
Are you kidding me? Which eastern rite, Catholic or Orthodox, has its liturgical prayers in modern Greek? There is not one style of liturgical Greek for Byzantines and another for Latins! Like historical pronunciations of Latin, how the Greek was pronounced in Paris, London, Madrid, or Vienna at any given point in time is irrelevant. For over a century, the Roman (Italian) style of pronunciation has been used in Catholic churches in English-speaking countries. As the language of this forum is English, and the CMAA's activity is based in English-speaking areas, we have no reason to assume that consideration of German, French, or other non-Italian pronunciation is at all relevant. Furthermore, the Greek portions of the papal liturgy were historically sung by Greek clergy, cantors, or choirs."A liturgy in modern Greek."
Like modern Greek.How are they supposed to be pronounced?
Liturgical Greek.Is there name for the type of pronunciation that is most commonly used in Catholic Masses?
Exactly.Is it how the Eastern rites pronounce Greek in their liturgies?
It's been noted numerous times on our forum that Latin in times past was pronounced in each and every land just like one's own language,
one's own language
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