Do NOT update Realtek AMD drivers from Realteks site. Alot of there Windows 7,8 and 8.1 drivers are not WHQL signed. Windows does not play nice with un-signed drivers.
This driver will work on MOST AMD 970 boards with Realtek audio. Not all 970 boards.
The PC that I have hooked to my TV has a Asus M5A97 EVO. I just updated it's Realtek audio driver the other day. Realtek 6.0.1.8522 is the newest one that works with the AMD 970 chipset motherboards. This is the Official WHQL signed release.
http://www.mediafire.com/file/b67lfmdcql3yfch/8522_FF00_PG468_Win10_RS1_RS2_RS3_RS4_Win7_WHQL.zip
Or
Pick your motherboard from this list of 4 at the manufacturers site. https://us.msi.com/search/MS-7693/product/1
All 4 are MS-7693 boards But the MSI 970 Gaming uses a different set of drivers than the other 3.
Select your motherboard,
then click "Support",
then click "Driver",
Select "Win7 64"
then click "Onboard Audio Drivers" and download the latest driver.