To Eleven is an MP3 player for the Sega Dreamcast. Its user interface is displayed completely on the LCD screen of a VMU (meaning a VMU is required) so no television is necessary to use it. This means that the Dreamcast can be hooked up to a high quality stereo system, even if it's not near a TV. However, if the Dreamcast is hooked up to a TV, the screen is used to display visualization of the music as it plays. To Eleven uses MAD to decode MP3s.
To Eleven reads all MP3s off a separate CD, so it only needs to be burned once. The MP3 CD should have the MP3s burned to it as data, not audio. To Eleven supports directories and ID3 tags for organizing songs on CD.