Improving Galaxy Nexus's audio quality
It seems that Voodoo Sound Control on your Fascinate/SGS worked because of three different pieces - the preinstalled Voodoo Control app, a specific digital to audio controller, and a kernel that can allow the two to communicate. As best I can tell the Galaxy Nexus doesn't have the correct DAC nor a kernal that would allow the controller app to work. Sorry, it seems you're stuck with EQ apps for sound quality. 

My suggestion at this point, if you're needing more volume from your phone, would be to look into external powered amps.