How would have St Augustine (354-430AD) and St Jerome (342-420AD) pronounced their Latin?

I’m new to Latin and am wondering how St Augustine and St Jerome would have pronounced their Latin, including when reading the scriptures and other religious texts. I’m thinking that they would have used a pronunciation similar to the restored classical pronunciation that we use today, given they lived in the 4th century (as opposed to today’s ‘ecclesiastical pronunciation’). Are people here able to confirm this?

Luke Ranieri, who shows up here from time to time, produced this chart:

Ranieri’s Latin Pronunciation Chronology

Funny how Ranieri has “ch” and “dj” (IPA [tʃ dʒ]) for Latin ce/ci/ge/gi in the 4th century, as in Ecclesiastical pronunciation. Not sure whether I agree, since “Proto-Romance” should have [k g] because of Sardinian, which still retains [k g] before e i. But considering how widespread the fronting of ce/ci/ge/gi is in Romance, maybe it’s possible the change was there in the 4th century already, a change that didn’t happen to reach the island of Sardinia.