[hpsdr] Windows 10/PowerSDR/WSJT-X sound settings

[John Ackermann N8UR]

I am seeing my sound settings mysteriously change or fail when running
PowerSDR and WSJT-X through VAC on Windows 10.

The symptom is that WSJT-X stops seeing audio input, though the sound
settings in both programs select the correct VAC cable, or the WSJT-X TX
audio output is routed to the speakers instead of PowerSDR, again where
the VAC cables are properly selected.

This will happen while the system is stable (well, as stable as Windows
ever gets...), i.e., everything is running fine, I leave without
changing anything, and come back a couple of hours later to find these
problems.

Usually I have to restart WSJT-X and sometimes both programs, then
things start working again.

Any ideas about what might be causing this, or a cure?

Thanks,
John