Same issue here - clean install, no mods or fixes and no voice when Rory's speaking (I can hear the dog barking though if that helps), also tried playing with & without original SG mod, forcing the sound into stereo for headphones (just in case that was the issue); along with talking with him a couple of times both with and without other people in the party all with no luck, can't get him to speak aloud or join the party.
Let me know if you want the save file this is happening in.
Not sure if it's worth checking the original VO files to make sure they're in the right format, know the .wavs usually used for VO are saved mono so there's a possibility of something going screwy there?
Best of luck tracking down the problem and thank you for putting together such an extensive add on for the game
Edited by Furtled, 26 November 2011 - 06:35 AM.