"A Browne" wrote in message
...

It's used on almost all analog broadcasting. Very little on Iboc.

Wrong. HD signals are processed (the right term) for consistency and a
stable dynamic range.


Sorry to correct you Eduardo....most of the stations I have dealing with
are currently not (or barely) processing their IBOC signals.

And all that I have seen have either the Omnia or Optimod digital versions.

First, the differing levels of different source materials demands that a
degree of leveling be applied just for consistency. Then, we have to
recognize that the listening environment, particularly in vehicles, is noisy
and the dynamic range has to be brought up to avoid lower level passages
becoming masked in ambient noise. While clipping and severe peak limiting
are not needed, avoidance of occasional high excursions also improves the
listening experience.

I'd love to know of any HD-1 signals that are not processed. Most of us know
that in-car listening is subject to dropouts beyond about the 64 dbu
contour, and having the analog and digital signals similarly processed is
important. Plus, lots of content was originally analog, and needs a degree
of control.