To Luís:
This is a bit difficult thing to explain, especially because I was never taught anything about accents, everything I know I learnt by myself (listening and reading). Unfortunately I don't know any IPA or SAMPA. (But I'd like to learn them! Do you have any suggestions, where and how I could do it?) Also I'm not good at writing pronounciation guides in English as Lithuanian is pronounced very similarly to my native Finnish. But I'll try to help a bit, I hope someone here will be able to tell more.
As you know already, some of the Lithuanian vowels are called short, some long. (For those who know Finnish: Lithuanian long vowels are the same as Finnish double vowels). They are as follows:
SHORT / LONG
a / ą
ė / ę e
i / į y
u / ū ų
Where there are two different letters for long vowels, they represent the same sound, you just have to memorize which ones appear in which words and word forms. Now you're asking, why two letters for each sound?
Historical reasons... the letters with the "hooks" used to be nasal like in Polish and they are still called like that, nasal vowels.
The long vowels are pronounced the same way as the short ones, just longer.
The letter
ė is pronounced differently form
ę e. The latter ones resemble German/Swedish/Finnish
ä, while
ė is like
e.
The letters
a and
e can be either long or short. They are long when stressed, in other positions they are short. But there is one thing that makes this even more complicated, there are three types of stress and only two of them make the letter
a or
e longer... sorry, I hope someone can explain this with more detail
. But I think this is not so important for beginners anyway. I learned Lithuanian pronounciation by listening to my teacher only, I don't care about the different stress types, and Lithuanians can still understand me.
About
i... I can't imagine how it can sound like Polish
y, I thought there is no such sound in Lithuanian. I don't know about the dialects, though. Maybe egidijus can help with this?