Here is the sound for "так": http://www.loecsen.com/travel/0-en-67-2-70-free-lessons-ukrainian.html Just click on the word "Yes" in the list to the left.
I hope we can hear some of the words here: http://www.forvo.com/languages/uk/
It looks like this word has more than one meaning: http://www.freelang.net/online/ukrainian.php?lg=gb
Maybe this dictionary is better: http://www.cybermova.com/cgi-bin/oluaen.pl
Dear Ukrainian learners, Being a native Ukrainian speaker myself, I assert that no words can convey how I am thrilled that this course is finally released! У добру путь!
For those interested, Ukrainian has the Vocative case, which is used when addressing to persons or objects. It is a literary form and it is still widely employed. For the sake of simplicity (there are words in 6 other cases to learn anyway :-) ), Vocative was not included in this course, but you will be undoubtedly understood when you say мама instead of мамо.
I tried that, it didn't work for me. The only way I could find to remember the letters and their sounds was to link them up to easy words. For instance:
Мама : Mama
Writing a page of words like that made it a lot easier to remember the sounds, and it seems to be how this course is set up. I also wrote out a page of words using the English pronunciation but in Ukrainian Cyrillic, so like this:
Стоп : Stop
As that's even less effort as I don't need to find actual Ukrainian words. If that doesn't work for you though then there's a bunch of videos on Youtube going through the alphabet. Including some with puppets which is just great.