“Spectrum” is certainly in the running for most remixed song of the year. As of now there are seven remixes of varying styles as well as an acoustic version — enough choices to suit anyone’s taste. Although we posted many of them yesterday, the package isn’t complete without the Congorock remix and acoustic version. These two tracks have nothing in common — except that they were birthed from the same song — but each bring something important to the table. The acoustic version is stripped down to nothing but a tinkling piano — played by Zedd — and Matthew Koma’s spectacular vocals. It’s not of the dance music persuasion but it does illuminate Zedd’s versatility and unparalleled talent. Congorock’s version on the other hand is full of synths, melodies, and layered elements. The acoustic version is unfortunately not yet available for purchase.