Here are the results for The Beatles in Mono multiple disc box set, EMI Music Japan cat# TOCP-71041-53. Metadata is from Discogs, their reference is [r9030189]. MP3TAG can use this reference to populate all the fields, including Album Artist, artist, disc track and so on.
As catalogued, the album title is the same for all discs. “The Beatles in Mono”
Here is the File Exporer view, each disc has its own folder.
Roon displays the 11 titled discs, with the same label of “The Beatles in mono”, but has different cover art.
Using the SAME metadata, here is a shot if JRiver26. The single album with the cover art as determined by MP3Tag.
Back to Roon, the individual covers come from ? Roon decides. These are iconic album covers, but it would be consistent, if the albums are split up have the titles on them, like “The Beatles in Mono” “Rubber Soul”, but the album view only lists what’s in the metadata.
So in the case of the Pierre Henry albums where the subfloders are listed CD01, CD02, the structure is correct when the album is opened, but when named as per the album, it’s split? Is this behaviour written down and illustrated anywhere?
Would like an answer where the box cover art in Roon needs to be stored so it can be clicked on to view from Roon.