HDMI audio help (GA-H170m-D3H)

Hi everyone. I built my first hackintosh. Everything is ok except for the hdmi audio by the graphic card (evga gtx 750 ti). I tried a lot of ways without results.
Does anyone have a good idea?

Hardware:
GA-H170M-D3H
I5-6500
EVGA GTX 750 ti
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