mpatric/mp3agic — Issue #6: mp3agic seems unable to save "genre tags" as string
Author: hennr
Created: 2011-11-13 14:57:04+00:00
State: open

As far as I know it is allowed to save a string into id3 tags.
The genre IDs are only there to save some space.

Jaudiotagger ( http://www.jthink.net/jaudiotagger/ ) e.g. does support saving free text into the genre field.