Such as you can get with winamp or Media player on a PC so that some image moves in response to the music? I had a sony HU a long time ago that did but it seems that for the most part this isn't a common feature.

Playing videos and what not is common, but when listening to music I would love to have something more than just the control screen and song titie... something nice like milkdrop from winamp would be perfect...

I know you could do a carputer but I am hoping for something easier.

thanks!

 

A lot of head units have spectrum analyzers included that are pretty neat and actually functional. My old 6900UB had three different ones with three different effects.