hello one and all again, i would like to post an update on my problem.
my hard disk crashed last friday. i swapped a new one out and put a new one in and did a clean boot of windows. right now, without any codecs... not even vlc, i just redownloaded dks into my computer.
and guess what, the audio works fine. all the fmvs and speeches work flawlessly now (i think. i played it for 5 mins and this was what i got)
so.. problem solved? lol. oh well. i'll update if anything else again.