[BC] IBOC AM Quality

[Robert Orban]

At 04:52 AM 3/23/2007, Rich Wood wrote:

>You have to have a continual supply of very good weed to believe the same 
>grunge processing won't be used on the digital signals. It has to be. 
>Otherwise the constant mode switching in cars will drive the listener 
>nuts. Bad processing habits are very hard to break. The minute the General 
>Manager hears his signal softer than the competition the order will go out 
>to make it loud.

If you use exactly the same processing on the HD and FM analog channels and 
modulate each one to its permitted peak level, the HD will be 5 dB louder 
when the receiver crossfades. THAT would drive the listener nuts. Instead, 
you use 5 dB less limiting on the digital channel, the receiver fades 
smoothly from analog to digital, and the digital sounds much less grungy if 
the analog FM is heavily procesed.

I keep explaining this but it doesn't seem to have sunk in :-(

Bob Orban