Here one example; there are many. There is a composition, “Czech Rhapsody for violin & piano, H. 307” by Bohuslav Martinu, in my library. Here are its tags:
…and here is AllMusic’s entry, which in this case has some text metadata:
Ostensibly, Roon will automagically link Allmusic metadata to any album it recognizes. Let’s see:
The album is clearly identified, and some album metadata appears. Now we look at the compositions:
Ah, not so lucky. None of the compositions are linked! This is a frequent occurence, and all is not lost. Looking at just the Czech Rhapsody, first we check for canonical spelling. So I open Allmusic, find the composition under Martinu, copy and paste into my tags.
Its done (see first pic) but still no composition linkage. I make other checks, such as correct composer spelling, but all is well. Well, what’s wrong?? Why no linkage?
One possible reason for no linkage is the absence of any metadata, but that is not the case for Czech Rhapsody. Why else?
Because, Roon only links what it considers to be VALID compositions. Validity is established by triangulating on known, correct exemplars. And the only exemplars in the current Roon system are found in TIDAL.
If I examine the TIDAL composition list, Czech Rhapsody does not appear anywhere. See below partial listing:
So, (this is the punch line), if there is no TIDAL composition (on any album), then there can be no validity established, and hence there can be no metadata linkage to that composition.
It does not matter if the composition tags match Allmusic’s to a T. Roon will not link to it. Or so I believe.
But I also thought this system would be changed, or a workaround developed. Hence my OP.
PS: My advance apologies to Roon for any misrepresentations. This was all by inference.