After universal complaints about horrendously poor audio quality,
iBiquity has revamped their IBOC digital AM system by switching to the
"HDC" codec -- a slightly warmed-over version of AAC Plus, as used by
Digital Radio Mondial (DRM).

iBiquity claims a large improvement in quality -- but can IBOC, now
with HDC, even match up to the quality that analog AM Stereo has
offered for decades? Listen, compare, and judge for yourself:

http://www.geocities.com/kevtronics