I have tried - Reinstalling drivers, relogging after turning voice off then on, setting device settings, going to a region which has voice and resetting, restarting my whole computer, checking slvoice has an exception in firewall, trying different HTTP fetching options, shutting down all applications that use voice, relogging and ending slvoice process, tried a different viewer entirely...
As I said, "everything" listed in the wiki.
I MUST stress this isn't an issue with my own microphone itself (it works in other programs) the issue is I have no "dot" at all and cannot hear voice either.