All your music, in one place. Audi MMI (Multimedia Interface) radio is a sleekly designed, intuitive interface that controls basic radio functionality, as well as other media inputs, including a CD player, an SDHC memory card reader, auxiliary-input port, and more, projected on a screen and operated by a central rotary/push-button-style control. MMI radio is host to a variety of controls focused on delivering the perfectly balanced stereo to all seats.