I would like to pursue the question of mass copying of tags a little further. The solution of -c [copy tag] and -v [paste tag] works well on a small scale, but it is very cumbersome when one has > 1000 albums because it is necessary to be absolutely sure that the numbers and orders of tracks are identical, otherwise there will be a disastrous mis-match.
I have tried exporting tags to a flat text file, but I found it very difficult to get the import format correct for the Convert / Text File - Tag command. Would it be possible to provide standard import filters that match the standard export formats provided in the Export as csv or as txt_taglist commands? Perhaps they exist and I don't know how to find them.
But, on a larger scale what I would really like to do is to search an exported tag text file by, say, %artist%, %album%, %track% and then transfer the rest of the tag information to the new tag. The organisation of my library is \%artist%\%album%\%track% - %title% but for historical reasons the album names and track numbers don't always match - e.g. I may have multiple discs for an opera in separate directories for my iTunes files but in a single directory for my flac files. Performing the search described will copy tags when everything matches, leaving a much smaller number of tag copies required when things don't match.
Is there any way of setting this up? Any suggestions would be gratefully received.