I ripped the bluray of the main album and imported into Roon. Although DVDAE did not identify the songs, Roon did. It identified the songs, artist and album. If I click on the album, all looks well.
Then I ripped, with DB power amp, the remaining 3 discs of the set. They show up fine. But, when I try to merge them, the first, main disc, shows no metadata and says it is unknown–each song is called "Chapter 01.flac, etc. and simply says imported into Roon.