Milkdrop is an open source reimplementation of the old-school WinAmp stuff, so it tends to have the same disappointing visualizations that don't match well.

Disappointing? What?? milkdrop is decades old, still works (while AVS crashes on startup) and has very good presets (altough editing is a world of wizardry).

It's not really synesthetic, but, nonetheless, what DID you expect?