This feature has actually been a pet project of mine for quite a few months. You know, the kind of thing you work on when you have spare time left over from your spare time (which is to say, very rarely).
When I started the project I wasn’t even sure if it would be possible to get Plex to host iTunes visualizers. Getting the FFT code (spectrum analyzer) to match up more closely with iTunes’ was one of the more challenging parts. After countless hours, I’m happy to say that the feature now works well enough to be included in the latest development series.