Haha. But understand that it was only an assumption of mine that creating visualisers might be a bit retro.
Perhaps it is still an active phenomenon, and creative and talented people will always come up with new stuff build on proven and older ideas and concepts.
I would hate it if my remark discouraged you to do something that might be fun to do, and might be a nice addition to MusicBee.
MP3 is by now 23 years old, and still cool to use!
(well, vinyl is even cooler, and about 90 years old)