[BC] Digital Intgerference (was AM Interference)

[DANA PUOPOLO]

The last I knew, WBOS was playing CD's. Paul Shulens, the DOE in Boston made
his own huge CD Jukebox that runs all the stations there.

-D



------ Original Message ------
Received: Sun, 18 Dec 2005 08:58:03 AM PST
From: Cornelius Gould <cornelius at cgould.com>
To: Broadcast Radio Mailing List <broadcast at radiolists.net>
Subject: Re: [BC] Digital Intgerference (was AM Interference)



Rich Wood wrote:
I think WBOS would fit your requirements
> for punch and the stuff in the mixes that gets lost in analog 
> processing. It wasn't CD quality but there was a definite difference. 
> Artifacts would be the only thing that would bother me in listening to 
> the station. There was no secondary on WBOS, so I assume it was 96Kbps.
> 

Rich,

Are they using coded material on the Hard Drive system, or the STL (or 
both)?

If so, this can account for the artifacting you hear.  My experience so 
far is that at 96 kBPS, it's really hard to pick out artifacts...at 48 
kBPS, they are there...about on average to the typical mp3 @ 128KBPS 
files I hear.  This assumes a purely linear audio source on Hard Drive & 
STL link.

What I do notice, however, is LOTS of artifacts as the HD codec is 
cascaded with any other. Most notably, commercials that are delivered to 
stations in a compressed format.  It's really hard to listen to HD Radio 
broadcasts when these sources are playing.  I find myself flipping on 
the CD player during commercial breaks to find relief.  Isn't it funny 
how people synchronize their spot breaks?  No relief anywhere on the 
dial...except for Non-Com.  Same goes for all the basic cable TV 
channels synchronized breaks. LOL

Anyway, the HD Radio codec doesn't seem very tolerant of pre-bit reduced 
  material to my ear.

The learning curve goes on....

-C

-- 



- Cornelius Gould
________________________________
"The significant problems we face cannot be solved at the same level of
thinking we were at when we created them."
- Albert Einstein (1879-1955)


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