Of course, you realize that the visuals are responding to frequencies, not instruments. The same instrument, played in a high register, will produce different results than the same instrument played in a low register.

My favorite responses are the "cloudy" ones at low sustained frequencies: Grampian, Hercynian, and Caledonian. Feed 'em Crystal Method's "Vegas" album. Low synthesizer bass or very low sustained bass guitar looks awesome on those.

Tony Fabris
Empeg #144