Tip to whom it may concern
There is a tag field MOOD to specify the character of the song in mp3tag.
In Windows Explorer is an option to display tag info in content pane by selecting appropriate info fields for columns.
If MOOD field is filled with mp3tag and MOOD is selected in WinExplorer it will be displayed blank.
MOOD in WinExplorer corresponds to COMMENT MUSICMATCH_MOOD field in mp3tag
BR
See also this thread in the mediamonkey forum ....
http://www.mediamonkey.com/forum/viewtopic...t=56366#p290896
DD.20151127.1719.CET
I've been using Musicmatch for over ten years and I've never seen Windows Explorer display any of the COMMENT MUSICMATCH_ fields, which is one of the reasons I started using Mp3tag because it can read and write those fields.
I use the following fields:
COMMENT MUSICMATCH_MOOD
COMMENT MUSICMATCH_PREFERENCE
COMMENT MUSICMATCH_SITUATION
COMMENT MUSICMATCH_TEMPO
None of them show up in Windows Explorer, they all show up in Mp3tag.
As a test I used Windows Explorer to add Mood to a file. It showed up in MP3 DIAGS as a PRIV tag which is unsupported by Mp3tag.