All the more reason why it's strange that it doesn't work. Only other thing I can think of is to try it on a different device, and to try it with the Mute settings toggled on in the menu.Version ingame says it's 1.20, yeah. What directories exactly would you like to see? Though since all I did for testing was unpack the game and mods, then moved the mod files into "game", I'm not sure there is much to see. I've attached the main and ones within game.
While I was putting the mod together myself, the voice clips would only fail to play if I didn't specify their names correctly in the script, which happened more often than I'd like to admit. I'm wondering if something like that happened? You'll need a program called rpaExtract to unpack the files, then you'll be able to see the raw .ogg files, and if you open up the .rpa files in a text editor, you can look through the script and compare the voice commands.