Thanks a lot for your answer and explanations. I understand that this is probably a very particular case. But the workaround you suggest is ok for me!
The tags for this file are now the following:
TITLE = Downtown
COMPOSER = Neil Young; Danny Whitten
WORK = Come On Baby Let’s Go Downtown
PART = 1
In the Album’s Metadata Preference window, I selected “Prefer File” for Composition/Part Grouping.
Then I re-scanned the album.
And now it’s ok! Now the “Downtown” title is correctly identified as corresponding to the “Come On Baby Let’s Go Downtown”'s composition by Neil Young and Danny Whitten (I have 4 other versions of this title, and the “Downtown” version is now correctly associated with these other versions).
I thought that this workaround would solve all my composition problems (i.e., I thought that, for any title that would not be automatically associated to its composition, this would be the way to “force” the association).
But unfortunately, it is not the case.
I did the same as you suggest for a title (“The Musical Box”) which is on “The Total Experience Live in Liverpool” album of Steve Hackett, and for which I have 6 different versions, 5 of which merged in the same composition. But this Steve Hackett version is not identified as a composition by Roon.
I completed the tags as follows:
TITLE = The Musical Box
COMPOSER = Tony Banks; Phil Collins; Mike Rutherford; Peter Gabriel; Steve Hackett
WORK = The Musical Box
PART = 1
But for this title, completing the WORK and PART tags didn’t change anything. The Steve Hackett version of “The Musical Box” is still not identified as a composition, and I cannot associate it with the other versions of the title that I have.
So, where is the difference between the Crazy Horse version of “Come On Baby Let’s Go Downtown” (named “Downtown” on their album), and the Steve Hackett version of “The Musical Box”?
The only difference I see is that the “Downtown” title is considered as a composition by Roon (even if it was a wrong one), while “The Musical Box” (Hackett’s version) is not.
It seems that the correction is only possible for titles that are considered by Roon as compositions. For the titles that are not considered as compositions, nothing can be done to associate them to an existing composition.
Am I right?
And so, I repeat a request that I made in another thread (“What constitutes a composition?”): When Roon doesn’t identify a title as a composition (and because of that doesn’t merge it to an existing composition of the same title), we should be able to associate this title to the composition manually. Can we expect to see this possibility added in Roon in the future?
Thank you again for your reply, and let me add this: I love Roon, and let me congratulate you for this great program!