VMWare vSphere High Sierra USB Audio?

Hi folks,

I have successfully installed High Sierra in a Virtual Machine on VMWare vSphere 6 with a NVIDIA GT 1030 passed through for graphics.

It's my understanding that Audio over HDMI does not work on this card so I have been looking at alternatives.

I have a Fiio E10K USB DAC that is supported under OS X apparently.

I tried with USB pass-through and it is detected but there is no sound. I also tried USB pass-through on Windows and it didn't work with the same issue with xHCI but it did work with EHCI + UHCI which only supports 1.1 and 2.0 devices. I don't mind sacrificing USB3 support to get audio working but I have not had success so far on OS X.

Any help would be greatly appreciated.