Missing audio driver for Quadro RTX (Windows, 511.09)


why is there no audio driver included for the Quadro RTX series on Windows?
It is not possible to output sound via DP/HDMI to a conncected Display/TV. Although the NVIDIA control panel shows the sound capability of the connected device, I’m not able to select the device as sound output in Windows sound settings.
I tested the sound output on Linux (Ubuntu) and it works. This seems like a issue with the Windows driver package from NVIDIA.

Thanks in advance for any kind of help!