I had this problem today, which I finally managed to solve. I thought I’d post here so someone else can find the solution quickly, if they do a search.
The problem was that I lost all sound in Studio. When I went to the Audio setting, I could see DirectSound and my driver selected. However, when I tried to select a different driver, the list of drivers vanished and was replaced my “NoSound Driver”. From that point on, I was unable to select a driver under DirectSound. Selecting ASIO or WASAPI options caused Studio to crash.
All other audio applications on my machine functioned normally. Rebooting my machine had no effect (I figured maybe some other app had locked my card).