Every Noise at Once – an algorithmically-generated scatter-plot of musical genre
everynoise.com
everynoise.com
Similar effort, but purely editorial and only about electronic music, with commentary
Would be cool to ad a crowd sourcing element to suggest changes to get an even better base.
An undo for the "listened to this" icon would also be helpful.
Searching for my favorite band (Savatage) they are in roughly the right categories (all sorts of metal) but in sum too far away from classical. Dunno how to express this better, seems like a complex problem though.
But if you go into a genre's own page and scroll down, there is a little inset map of that genre's immediate neighborhood. That view is restricted to the most similar genres according to ALL the dimensions, so breakcore's neighborhood, for example (http://everynoise.com/engenremap-breakcore.html) doesn't include "boy band" at all.
edit: Oh, I'm probably looking at it backwards and those are the least similar genres. "Classic Chinese pop" and various folk musics are less surprising.