Game's supposed to be voiced, but voices don't play?
EDIT:
After some time investigating and experimenting, I finally managed to get voices to play, but only in the Japanese version, using locale emulator, with the original config.rpgsave file, for some reason. Using the one from the translated version in the JP version doesn't work, and using the one from the JP version in the translated version causes it to have no audio and crash after failing to load any audio files in the menu. I have no idea why this is.
Decrypting the config.rpgsave shows that there is a field for "voice" that is set to true in the JP but false in the translated one, but changing this and re-encoding it doesn't seem to work. I admit I'm not a coder but I am stumped. I'm leaving this information here in case anyone wants to figure this out.