"Sven Franklyn Weil" wrote in message
...
In article , David Eduardo wrote:

There are 700 million radios out there; most all of them have crummy AM
response.

Tell me about it. ALthough those of us with the occasional hi-fi AM radio
would like to hear something resembling hi-fi. And it wouldn't be all
that out of the way for the broadcaster to do.

I thought the whole idea was to put out the best audio quality you could
to make the crappy radios sound the best they can. I still don't see how
IBOC helps the ANALOG signal.

It does not help. However, it does appear from observation that _reducing_
the bandwidth to the IBOC analog requirement makes the majority of the
narrowband AM receivers out there sound better. By not transmitting anything
outside the passband of the receivers or which is at the downslope region
may actually make the audio better. Otherwise, you are pushing bouleders
through a funnel.