HD Radio®
WARNING: This page is about a different car, the 2013 Ford Explorer. 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 and data (such as station call letters, artist, and title). HD Radio® channels duplicate analog channels; in addition, some HD Radio® channels subdivide (multicast) the digital signal into multiple channels that do not have analog equivalents.