I am still running a prehistoric Pitool 184.108.40.206, but just yesterday I updated my Windows to 1903 (May) release. After that I noticed Nvidia HD Audio was no longer present as an option in SteamVR Audio configuration. USB Audio was working fine though.
I installed the latest Nvidia drivers (430.86), which updated also Nvidia audio drivers, but it did not help with Pimax (or SteamVR).
I am just wondering if anyone with the newer Pitool, who already updated to 1903 release and the new Nvidia drivers, noticed the same problem with the Nvidia audio, or the new Pitool is supposed to fix that. (This could be a good reason to finally update the Pitool.)
I actually prefer using HDMI/DP audio over using USB audio to save USB bandwidth/latency for tracking. But we are diverging from the topic which is, does anyone also observe the loss of Nvidia audio in Windows 1903 update?