[BC] FM Stereo Question

Broadcast List USER Broadcast at fetrow.org
Sun Feb 28 17:34:14 CST 2010


After testing a whole bunch of radios with the various FM chips, and  
there are not that many different chips, NOT ONE uses pilot level or  
pilot noise for blending.

I  would try to ensure the audio is as clean as possible, as well as  
the baseband.  Make sure there is no audio around 19 kHz, and run the  
pilot close to 10%.  If you really want to turn it down to 9 or even  
close to 8%, go ahead, but it wont' make a difference.

CLEAN, reasonably loud processing, will do something, reducing the  
Pilot Injection won't.  One percent won't win anything.

Going mono might help, as the station won't be as noisy a the fringes,  
but people expect stereo, especially on mono stations where stereo was  
misused and we have many songs with the instruments in one channel and  
the vocals in the other.

--chip

On Feb 28, 2010, at 9:00 AM, broadcast-request at radiolists.net wrote:

> Message: 1
> From: "Dana  Puopolo" <dpuopolo at usa.net>
> [...]
> Now, it is true that some radios blend to
> mono-and may monitor the noise on the pilot to help do the blending
>
> -D



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