Wow what a resource thanks for sharing! The text that follows along with the audio is super!
Séamus O'Neill wrote:
As far as I'm aware, trilled r isn't very common in Munster
You can also hear him roll mhórthímpeal pretty clearly.
Tbh, from listening to the radio now or historical audio I find that native Munster Irish speakers interchangeably use tapped and rolled r's for broad r's, regardless or position, lenited/unlenited etc. - and as the pace of speech increases, I find that they tend to roll more.
I also think you're more likely to get a roll in between vowels e.g. in something like "mar a bhí" while a single tap (broad or slender) is probably more likely immediately after a consonant e.g. priocadh or crann.
I'd guess that if you were to fully roll every broad r, a native speaker wouldn't find that too unusual.
In fact, if you ever watch An Loingsearch talk about broad r's, he always talks about them being tapped where he defines that as a single tongue touch against the roof of the mouth.
However, he clearly rolls the r (with at least 2/3 taps) when he gives an actual example of it.
This is good evidence to me, from the horses mouth no less, that the sounds are fully interchangeable.
If you want some good examples of Munster rolled r's you can listen to David's recordings of Eoiní of
tá conjugated in the past tense where all the terminal r's, broad and slender, are clearly rolled.
I don't know what Eoiní would think about how he read them though, maybe he thought rolling might sound more correct or more articulated maybe? David himself may possibly have some insight on this, having done the recordings.
I have an unscientific theory about the phonetics of Irish r's which I'll ramble on about if anyone wants.