It could be that foobar2000 simply does not support that field as a multi-value one, for whatever reason.
Maybe that's true, but why would this happen only with id3 tags?
Multiple values in title tag is very usefull
ID3v2 is a horrible standard
and there’s no ID3 police to worry about!
Oh, I forgot to declare the point... I see you already thinked of it. Just to summarize:Current state of id3v2.4 implementation in foobar:- multiple values ("multiple strings" acc. to id3v2.4 informal standard) are supported only among small number of fields: TPE1=artist, TPE2=album artist or band, TCON=genre, TXXX=user defined frame and maybe few others. To remain objective, TXXX can be unlimited number of fields, so basically any information can be stored with multiple strings, the only disadvantage is that the information can't be stored in a frame which is proposed by ID3v2.4 informal standard (thanks, db :-)). The fields where multiple strings definitely aren't supported are among all TIT2=title, TSOP/TSOT/TSOA=sort names for artist/title/album, TPUB=label, WXXX/WOAR/WPUB/W-anything=all types of fields for URLs. From unsupported fields, only first value is read, and when user attempts to save multiple strings, the field is converted to TXXX frame instead of the original frame.
Personally, I've been using TOFN=original filename field for years (netlabels and scene releases) and there's no way how to display this field in foobar.
The only thing I am afraid of is we aren't blinded by chasing the perfection so much that we don't see that the results can bring fruits only on most up-to-date, fully configurable and configured software players. I don't want to polute support forum with my thoughts so I will experiment, research APEv2 tags and address my doubts in more proper part of HA.
Anyway, Monkey's Audio website states that ape files are supported by many popular software, such as Windows Media Player and Winamp.
Officially? A brief check suggests that WinAmp does. WMP, on the other hand, has always required to have this functionality added by the third-party WMP Tag Support Extender (now obsoleted by WMP Tag Plus, but the latter does not support APE yet despite plans to add it).