Multiple contentgroup (TIT1) tags in MP3

[zfc]

PS: Looking more closely it seems to be a more general question. I also use a custom tag "epoch" to tag the epoch of a composer, which I also assign multiple times (e.g. for Mozart "classic" and "Vienna Classic"). Again that works great for flac but it does not seem to work for mp3 in the same way.

I understand that there are some tag types that must not be assigned multiple times (title, album artist [not even differently inside the same album]). But in general one of the great things about minimserver for me is that it can handle tag multiples.