EMX - eMusic Download File is a file extension that is available for download online. It actually happens to be a very common music files that eMusic Download Manager uses for the download of different MP3 files. This extension will also give you a lot of information about the artists, albums and track information as well. You can gain access to different MP3 files if you wish. You must make sure that you know about EMP files which are not compatible with EMX files. You can also play the tracks right under different programs such as Windows Media Player and Apple iTunes. It comes in handy when you really need it. There are different versions that are compatible with this extension if you are thinking about downloading it.