USB audio interface

How do you navigate through a library of 10,000 songs? Preferably on the road using the vehicle's control functions. Almost all common MP3 players, Apple iPods and USB sticks can be integrated effortlessly with the audio system. The title of the track being played is displayed either on the control or radio display. MP3 players and Apple iPhones can be operated directly from the central console. All common formats are supported (MP3, AAC, WAV and WMA) as well as M3U-format playlists. To integrate an Apple iPod or Apple iPhone, the BMW cable adapter for Apple iPod/iPhone equipment option is required.