Voice cast in Megaman ZX Advent?

I'm really confused now. I watched one of the videos in youtube and I found out something interesting; It seems that in MMZXA you can hear the voice casting in the game... I have No$GBA 2.6 emulator and I have Megaman ZX Advent game too on it but question is, how you enable the voice cast in game? Is my settings somewhat wrong or is it rom based 'cause I can't hear voice acting in anywhere else than on the video like scenes... and since I don't want to use my own voice to do the voice overs, please help me out to figure how you can make them talk >.< here's a screenshot of my current No$GBA settings:

up your sound, the voice are realy quiet.but, maybe you have Eruopean version, i played euro vers. nad there was'nt voice.I'M FROM POLISH, SORRY FOR MY BAD ENGLISH