HDMI Audio Problem

I'm hoping to have this answered quickly, but I went to AMD's website and noticed that 11.2 was out, and I was still running 10.12 so I decided to upgrade. With the upgrade, I'm starting to have audio problems (I had these problems earlier with 10.12 but forgot how I fixed them), anyways: I have HDMI hooked up through my Diamond 5870, and have onboard video / sound disabled. So, basically my problem is this: the TV shuts the audio down unless audio is being streamed, so when you use your computer to browse and you have no audio then it's fine, but when a message pops up with a sound it usually gets cut out because my TV "refreshes" the HDMI signal, so to speak (the HDMI #1 output comes up at the top), and stays on for about 10 seconds then turns off again, so when I'm playing games and there's a dead silent part (like AFKing in WoW), then the audio will turn off until audio is being streamed again. What should I do? I've tried disabling all audio devices besides HDMI, enhancers, new HDMI cable, etc.