Inventing and assigning new "Genre" values possible?

[ohrenkino]

See here how to add non-standard genres:

Add custom user-defined Genres

Add and Edit user-defined Genres via Custom List Values Every field on the Tag Panel can have custom values added to its drop-down list. These can be customized via Options → Tag Panel and the Genre field is no exception. You can use Options → Tag Panel → Genre → Custom list values → Manage... to edit the list of custom Genres and also hide the standard genres, if you prefer your own. The following screenshot exemplifies the process: [User-defined Genres] Import and Export of Custom Lis…

Programs that follow the ID3V2 standard should show the genres as found in the files.
Programs that can only deal with ID3V1 tags are limited to the standard genres.