Thanks for the quick reply. Its the Hauppauge 500 dual tuner. Its been working fine for months until yesterday and the kids were complaining about the sound and I shrugged it off to a reboot. Today I wanted to watch a recording so now I have to fix it. all the recordings play fine outside of GBPVR, it just seems to be something within it. I renamed the config file, reconfigured it and still no dice.
Maybe he's got the same problem as I did in net radio? Try pressing (and holding) the right arrow key, this turns up the internal volume. I know it's a long shot but I figured I'd try to help