Wait a minute, I have the feeling that everything is getting more and more confused
First. Since I didn't understand your initial question, I just summarized some basic things about the topic in the hope that it helps you to collect your thoughts and to formulate your question understandably.
TBH .. I still don't know what you are even getting at or what your problem is.
> The 12Mic does not have any analog outputs (not counting the Phone out)
Has no one claimed
> so why would a line level voltage ever be required?
Has no one claimed, maybe there is a misunderstanding from your side
> The mic level signal could go directly into the ADC for conversion
Thats what I told: "The 12Mic performs an A/D conversion which is needed to be able to send the data to the recording interface, either through MADI or through ADAT"
> In the subsequent digital domain "line level" does not have any meaning, to my knowledge.
Of course not and has no one claimed.
BR Ramses - UFX+, 12Mic, XTC, ADI-2 Pro FS R BE, RayDAT, X10SRi-F, E5-1650v4, Win10Pro22H2, Cub12Pro