There currently many radio stations in the US broadcasting both analog and digitally now, mostly in larger cities. The digital broadcast are clearer. There is no fade, multipath, or noise on digital. Digital still has limitations as to distance and penetration, mostly due to lower power levels. The main advantage of digital is bandwidth. Like with digital TV, you can have a lot more audio streams in the same space as one analog broadcast. You can also stream text at the same time. Most digital receivers display the song played, and sometime traffic data at the same time. One reason the TV and radio stations like to switch to digital is to compete with all the paid services, like cable and satellite TV and radio. Broadcast (Free) TV and radio stations can now have several channels in the same spectrum that their old analog station occupied. More channels mean more chances to sell advertising.
