Hmm, I can't get the voice guidance working properly.

I'm using the openstreetmaps and openrouteservice for the navigation, I've extracted the voice files and am able to select them from the menu dialog. However nothing is spoken, I just get the directions on the screen. The voice files are in English, the directions are in Finnish on the screen. I tried to select device language as US English, but that doesn't seem to make any difference, the routing instructions still appear in Finnish and no voice is played. Any ideas what to check?

edit: fixed now, apparently my ogg support was broken