Non 8-channel LPCM SAD EDID Issues

Capture the Real-Time EDID with moninfo.
You should get something like this



and in your audio properties you would get something like this



Notice that the LPCM has "6-channel" in SAD and the "Max Number of Channels:" in audio properties is 6, these both should be 8
Edit the EDID to correct this value.
Install the EDID override
Monitors should be labelled as "Generic PnP Monitor"





You would get something like this



Notice that "Max Number of Channels:" is 8 now.