I have just started learning Sindarin but two letters' pronunciation that have really got me stumped are "O" and "A". "O",as said in the pronunciation guide, should be pronounced as the "O" in "Dog" but in observing Sindarin being spoken in the LOTR movies, I found it being pronounced like "oo" sound in "took". As well as that the "A" I found was pronounced differently (although sometimes it was still pronounced as the pronunciation guide explained) . It was pronounced neither "A" as in "hat" or "A" as in "father". (I would also like to clarify the changes were not due to stress marks)
I hope this isn't all a jumble of words and that you can help me out
If you're using the Lord of the Rings films as a guide, their pronunciation varies from excellent (Viggo Mortensen) to diabolically terrible (Hugo Weaving, though he did improve for the Hobbit films), and it doesn't help that they come from many different countries so they have a different underlying accent that will shape their vowels (e.g. Liv Tyler being American, Cate Blanchett being Australian etc.). Also they would have had limited training on set from a vocal coach.
There's two examples in particular that I can find (both spoken by Orlando Bloom as I find him easiest to hear): When Legolas, Aragorn and Gimli find the bodies of burnt orcs in Rohan Legolas says, "Hiro hyn hidh ab 'wanath" Note how he pronounces the "A's" in 'wanath. Also at Helms Deep when preparing the men for battle Legolas says, "Aragorn, nedin dagor hen u-'erir ortheri." Note how he pronounces the "O's" in "Dagor" and "Ortheri".
Thanks so much for helping out
(P.S My current keyboard does not allow me to add stress marks so I missed out a few there 😬)
Honestly he says the line in Rohan so quickly I'm not surprised the pronunciation is a bit off, I couldn't really hear what he was trying to say.
Regarding 'dagor' and 'ortheri' though, OR forms a diphthong sound that should sound like the English word 'or', or the 'ough' in 'brought, thought, sought'. His pronunciation is spot on in the Helm's Deep scene