Doom with @esxi_arm is much better with sound
Shown with the @NXP FRWY (LS1046A-based).
Audigy is plugged into an m.2 Key E to PCIe extender.
It also needs a bit more power than the FRWY is willing to share.
Note: current posted FRWY UEFI for some reason is missing the SMMU bits in ACPI. I am working with @NXP on fixing that! Stay tuned.
Coolest MP3 player so far. 
So yes, PCIe pass-thru works on Arm. With the way PCIe is exposed on current-gen LayerScapes this is a it janky (there's no RP), but it works. Of course proper servers are totally fine 😎.
Don't forget that PCIe PT does require pinning/preallocating VM ram, so doing this on a 4GB device is a bit academic.
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