While Media Center lets you add any custom library fields that you want - and I have been making use of that feature - it seems that some of the fields I have been adding actually exist in the ID3 specification.
For example, I added [Release Date] which is displayed as "Date (release)" to place it below "Date" when tagging files.
However, from reading the ID3 tag specification, I see that there was originally
TORY - Original release year, which has now been replaced by
TDOR - Original release time, in the ID3v2.4 spec.
I haven't been writing any of my custom tags to the files, but I would like to write spec-compliant versions of them into the files if they currently exist. (
this seems to be a list of them all)
Is it as simple as adding a new field called
TDOR and enabling "Save in file tags"? I assume that the "Display" value only applies inside MC, so I could change that to be "Original release time" so that it's actually usable.