Sorry about the posts but I'm adding some new stuff and have found some really strange behaviours. I have added a voice button in preferences. I use voices only in combat. If I try the "test voice" button in preferences, it works fine, I can hear the voice:
Voice isn't a traditional channel, like sound or music. It has some additional logic (so the voices end when the users click past them). Use "voice" rather than "play voice".
Supporting creators since 2004 (When was the last time you backed up your game?)