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Question Audio over USB 3.0 on Gigabyte GA-H81M-S2H doesn't work

May 25, 2020
I have a PC with Gigabyte GA-H81M-S2H and a i5-4400 CPU, with a fresh windows installation (Installed 2/3 days ago).
This PC is dedicated for streaming games, connected with a Elgato HD60S+.
I want to stream some games with my Nintendo Switch, and the video streaming is fine, but no audio is pass through.
I believe the problem relies on the motherboard, because i tried to use my Surface Laptop 3 instead of that PC, and i don't have any issues with the audio.
I have tried also to use Camera instead the Switch, and same result. Works on my Surface Laptop 3, but not on my Desktop PC.
I have also tried to use different USB ports, but nothing.
Any suggestion which the problem can be?