Super Sonic

[aubrey.wodonga]

I just answered your question in another thread. It doesn’t use any metadata at all:

Question about Plexamp Super Sonic + extra features

The blog post should clear up your questions: tl;dr - it’s a machine learning model that runs on your server and places each of your tracks, albums, and artists at a point in n-th dimensional space, and calculates the distance between each item to figure out similarity.