]Would it be possible to make a virtual tag which would include Work, Cat.Nr and Act/Movement? I've been trying to figure it out, but without any luck.
If you have already setup these two virtual tags, you could just add a third one concatenating those like this:
Virtual Tag 3: <Work & cat.nr. °>: <Act/Movement °>
Or, as a dedicated formula I think this should work:
$IsNull(<Show Movement>,<Album>": "<Title>,$IsNull(<Work>,$IsNull(<Work>,$Split(<Title>,:,1),<Work>),<Work>", "$If($Contains($Split(<Title>,: ,2),-),$Split($Split(<Title>,: ,2)," - ",1),)))