Regarding bhíodh muid, bheadh muid:

Is the final -dh a gutteral, or not pronounced?

ch or ú

In Cois Fhairrge at least, this sound is pronounced like a post-alveolar t in front of a slender 's'. The sequence of the two consonants (t + slender s) would sound like english 'ch' in the word chin. So then 'bhíodh sí' would approximatly be said 'vee-chee'.

I'm a bit curious, are there any other dialects which do this?

when I said ch I meant broad ch, but yes as a slender t before slender s -all dialects which use ch I'd imagine with parts of Conemara maybe mixed, as they can have long u or ch

quote:

In Cois Fhairrge at least, this sound is pronounced like a post-alveolar t in front of a slender 's'. The sequence of the two consonants (t + slender s) would sound like english 'ch' in the word chin. So then 'bhíodh sí' would approximatly be said 'vee-chee'.

to be more precise: only before subject pronouns that begin with s-: sé, sí, sinn, sibh, siad, seisean, sise, sinne, sibhse, siadsan, seo, sin, siúd.
You’d say "bheadh sé" mar "bheitsé" in Connemara and Ulster, but you’d pronounce "bheadh Seán" mar "bheach Seán" in Connemara and "bhe-ú Seán" in Ulster, since Seán is not one of these pronouns.

quote:

I'm a bit curious, are there any other dialects which do this?

Ulster.
Munster retains the ch sound before these s-.