http://www.hdradio.com/how_does_hd_digital_radio_sound.php
Ever wished you could get the same quality of sound from your radio as you do from your CD? Or that your radio signal didn’t fade out just when you wanted to listen to the game? Now you can. Get the kind of sound that was previously reserved for your HDTV, CD system or MP3 player. Get it on your radio. And get it for free!
* CD-quality sound
* Crystal-clear reception
* No station drop-off
* No static, hiss or audio distortion
NOTE: Webcasts such as this one utilize a compressed electronic file and should not be considered a true replica of the superior sound quality you get with HD Radio.