eMusic is the world’s largest retailer of quality independent music and the world’s second-largest digital music retailer, offering more than 3.5 million tracks from more than 27,000 independent labels - with every genre of music catered for. eMusic operate a subscription-based service that allows consumers to own, not rent their music. eMusic is the largest service to sell tracks in the popular MP3 format—the only digital music format that is compatible with all digital music devices, including the iPod® and Zune®.