AV.io 4K no Sound from any Source

Hi Adam,

sorry, i forgot to post my specs by my first post.

Mainboard: Gigabyte Aorus X399 Gaming 7
CPU: AMD Ryzen Threadripper 1950x (16 x 3,40 GHz)
RAM: 32 GB DDR4 3200MHz
GFX: Gigabyte 1080 TI Aorus Xtreme
OS: Windows 10 64 Bit

I built this Computer by my own, so there is no Maker or Model/Brand.

It doesn’t change anything if i’m using the front or rear USB-Ports, even the USB-Cable was changed.
Ironically, my old Elgato HD60S works pretty fine, no matter on witch USB-Port it is connected to.

Thanks for your help in advance!