Another one here. When I go to the Black Emporium I get ambient sound and the Antiquarian's random rants but no normal game sounds. At first I thought the ambient sound was hiding my Inquisitor's footsteps but a few attacks on thin air and jumping around a bit proved otherwise. No normal sound from the moment you enter the area. In addition the animals are all stuck in place though they do move their heads around, and the Antiquarian himself looks like something from the Playstation 1 days. Seriously, I think back to how Dr Cortex looked in Crash Bandicoot and if I'm brutally honest it's probably better than the Antiquarian looks now. Deleting and reinstalling the DLC didn't work for the game I'm in the middle of, though I suppose it's possible it'd be okay starting from a new game. I'll look out for that next time I start one but I'm not going to do it now.
This would be a fairly minor annoyance if the lack of sound didn't persist when you leave the Black Emporium for another area. I haven't tried every other area but of the three or four I have tried not one had sound, not even that area's normal ambient sound. Attempting conversation via subtitles with a requisition officer in Crestwood showed that conversation is also affected. Having initiated conversation it took so long for her to respond that I thought she wasn't going to and ran off to try something else when suddenly her line popped up on the top of the screen. And then like most others here I have the fun of saving the game while wondering if I'll have to restart to get sounds back or whether it's going to crash the system anyway.
Now I know it's free DLC and that it could be argued that we're getting what we paid for but try seeing it like this: have I bought Jaws of Hakkon or Spoils of the Avvar yet? Nope, because Black Emporium is so clearly cactus that I'm not going to buy paid DLC without spending some time seeing if other people are having problems, and I'd rather spend my free time playing at the moment. Plus it seems that Black Emporium used to work and has been stuffed up by a patch, which raises the concern that even if Jaws of Hakkon works ok now it might get banjaxed down the road. If you want people to buy your products it's really a good idea to make sure a. that your free samples work and b. that you don't accidentally break them for your customers later.
Edit: tried starting a new game and going to the Black Emporium the minute it becomes available. Same problem.