Yes,
IOMMU group 29:[1022:1487] 28:00.4 Audio device: Advanced Micro Devices, Inc. [AMD] Starship/Matisse HD Audio Controller.
I thought the same thing. Reason why I just updated to the beta. When I made the change the first time I had the problem with the VM locking up and a single core locked out at 100. I made a small change by just adding a sound card and having both the NVIDIA HD Audio controller and the AMD onboard controller but no luck. The VM would boot but would not recognize anything I had plugged into the ports.