Tutorial code not working - Unable to load DLL 'gstaudio-1.0-0.dll'

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Running on Windows 10, .Net Core 3.1, gstreamer-sharp-netcore 0.0.8, I have installed both gstreamer-1.0-mingw-x86_64-1.18.2.msi and gstreamer-1.0-devel-mingw-x86_64-1.18.2.msi and updated environment variables according to #5

Basic Tutorial 2 (https://github.com/GStreamer/gstreamer-sharp/blob/master/samples/BasicTutorial2.cs) runs fine, but Basic Tutorial 8 (https://github.com/GStreamer/gstreamer-sharp/blob/master/samples/BasicTutorial8.cs) does not.

I am seeing "Unable to load DLL 'gstaudio-1.0-0.dll' or one of its dependencies: The specified module could not be found. (0x8007007E)". There is a libgstaudio-1.0-0.dll in D:\gstreamer\1.0\mingw_x86_64\bin which is in the PATH but not a gstaudio-1.0-0.dll.

What am I doing wrong here? TIA.