as I have a few programs that alter metadata, but some of them do have a history of not cleanly editing existing ones (especially multi value metadata, which I use heavily, is hit and miss... which is why I want to make sure data I care about is not overwritten when sync-ing after one of the programs screwed up...) - can anyone recommend a program that allows to scan & compare metadata from files on 2 separate HDDs reliably (& conveniently ideally) (i.e. same file exists under same name & location on both HDDs... but metadata might differ on some fields) ?
And maybe even offers to merge metadata if differences are found... ?
I've found BeyondCompare... but it only does support ID3 from the looks (flac suppoirt is planned, but not there atm), so there's no point in even testing that as I'd need it for 100s if not 1000s of mp3/id3 & flac/vorbis on a regular basis, plus some outliers (aiff, aac, etc)...
MusicBee does have a metadata compare functionality via an add-on too, but it's only really usable if done on a per-file/one-by-one basis.
And foobar does not seem to have any add on to deal with metadata/tag differences of the same file in different locations as far as I can tell...
But maybe there's something that does this others have come across ?