I gave it a try again with DigiCheck NG v0.91, but it continues NOT to show any signal in Vector Scope and Spectral Analyser. The Global Level Meter only shows left and right Peak and RMS (the two L+R on the Right of that window) signals. I don't know what the two L+R Global Meters  on the left side of the window show. I read the complete Help file, but to no avail.

DIGICheck v5.96 does show signal in the Spectral Analyser and the Left and Right RMS and Peak Global Meters. However, the Vector Audio Scope only shows a vertical line; so the middle of the Vector receives signal but doesn't show the whole picture. The Global RMS and Peak meters receive signal and show the full graphics bars.

Please note that I installed DigiCheck NG v0.91 and DIGICheck v5.96 on a Windows 10 Pro system, up-to-date with drivers and software. My system is attached to an RME ADI-2 Pro FS Black Edition, with latest Firmware and latest MadiFace USB driver.

Summary: Spectral Analyser and Vector Scope don't receive signal, hence don't show anything, so what am I missing in the setup? And why does the Global Level Meter not show the L+R graphs on the left in that windows?