It looks like the upstream app author would need to do a decent amount of work to adapt to the up-to-date taglib, based on what's described in the "TagLib 2.0 Release - Jan 24, 2024" section here: https://taglib.org/
If any users want to be able to use it on Tumbleweed, it seems they could be directed to file an issue at https://github.com/flaviotordini/musique/issues for the work to update
I just checked how much effort it would be. It is limited to renaming some occurrences of ItemListMap to ItemMap. ItemListMap was deprecated since TagLib 1.10 released 9 years ago. At the same time ItemMap was introduced as an alternative. the TagLib version compatibility (since such an issue doesn't yet exist, interestingly)? I just opened such an issue. I think upstream could just replace that. In the meantime I could just provide a patch. If nobody else is interested under these circumstances I could also take over maintainership, even if I also don't use that program actively. Martin