music pulse led’s

Hi, I have blue 12 volt led tubes on my boat, with just a positive and negative wire, and i want them to pulse to music coming from my radio. I can't find a good way to do this cause i want it a certain way, so if anyone can help me it would be appreciated. I want to have blue only plusing to music No mics, i want it to be hard wired like an aux or rca plug 12v all i can find is rf rgb audio controllers with a aux plug, which i bought, it works but for rgb so it looks stupid trying to power just blue lights i also have seen this: http://www.instructables.com/id/E1K7SJ2ZG6ERIE36TP/ but my only question is could that power as many led's as i have and is there a way i can add a sensitivity adjustment to it?

Try connecting the strings across the speakers. If the output is under 200W (into 1 Ohm), 12V LED strings will be fine.

but then the volume of the radio effects how much they pluse

Isn't that what you want - ie, they pulse to the music?