Steve Stone wrote:
The display on the 6 year old radio in my car was failing.
I replaced the radio with a JVC head unit that included a built in HD Radio
(IBOC) receiver.
The FM stations offering HD sound okay.
The AM station HD output is a tradeoff.
You are trading traditional AM noise for better audio frequency response
and what sounds like low sampling rates.

Steve
N2UBP

HD Radio/IBOC causes adjacent-channel interference is is a fraud and a
failure !