eMusic announced today that it has over 13 million tracks available to be downloaded on any digital media device, including iPhones, iPods, Zunes, and any other MP3 player. Once downloaded, you own your tracks; they are yours to keep and may be loaded onto any number of your own digital devices. Unlike iTunes and other services which allow purchasers to copy each song onto only five devices, eMusic has no limits, as long as each device is yours.