One of the fun things about the StarHammer universe is that there's technology that can stimulate parts of the brain to induce approximation of sounds, images and words. It's fairly widespread even. Some of it is even on display in the page above.
The colored lights are able to cause a sort of synesthesia where depending on positioning and various other factors you'll hear certain sounds or music that's cued to the light's frequency. Because everyone interprets lights and colors a bit differently everyone "hears" things a bit differently too.
Oh, and for those of you waiting for that DJ, you only have one page to go!