I am reading Modern Irish A Comprehensive Grammar by Nancy Stenson. On page 13 she says:
"When one word ends in a short vowel and the next starts with one, only one vowel is usually pronounced. The vowel omitted is usually the unstressed one, most often the last vowel of the first word. If both are unstressed, then, since both are pronounced alike, it is impossible to tell which is lost, but only one vowel is normally heard. Thus,
duine aisteach is pronounced duin’ aisteach
cóta Éibhlín is pronounced cót’ Éibhlín
duine atá is pronounced duine ’tá (or duin’ atá)"
But when I go onto
https://www.abair.tcd.ie/ga/synthesis and enter the above phrases both vowels appear, to my untutored ear, to be pronounced. Is this a limitation of the Abair engine, has Stenson got it wrong or am I missing something?