the pronounciation of "buildings"
In American English, if a word ends in voiced consonants, then when you add an S, continue the vocing throughout the entire word,and it should become a voiced zzzz.
So, "things" pronounce "[θɪŋz]", "songs" pronounce "[sɔ:ŋz] ", "buildings" pronounce "[ˈbɪldɪŋz] ", is that right?