HD Radio®
WARNING: This page is about a different car, the 2014 Ford Focus. However, it is still accessible from the selected car via links, so may be relevant.
HD Radio® is a free to the public digital radio broadcast. Radio stations transmit digital AM and FM audio along with data (such as station call letters, artist, and title). HD Radio® channels duplicate analog channels. Some HD Radio® channels also subdivide (multicast) the digital signal into multiple channels that do not have analog equivalents.