Re: arsclist Dolby and unintended consequences

[Mike Richter <mrichter@xxxxxxx>]

At 11:17 PM 6/25/2002 -0700, Richard L. Hess wrote:
> Hi, Joe,
>
> I didn't think so...but I could be wrong. I thought you could use your 
> standard Dolby B processor for decoding it.
>
> If you have an article, I'd really like to see it.
>
> Of course you had to bandwidth limit and REALLY notch at 19kHz--that's why 
> many reel and cassette decks and standalone Dolby B units had multiplex 
> switches, but that was to avoid the pilot tone at 19kHz from falsely 
> adjusting the Dolby--that's the only thing I can think of...but it's late.

(If you bottom-post, there's a better chance you will delete the irrelvant 
posts on the thread and the ads.)

I believe Dolby FM used the standard Dolby B but worked on the signal 
before de-emphasis. That may be the difference Joe thought of. Note that 
calibration was particularly critical; if the broadcaster did not provide a 
reference tone regularly and the listener did not use it (in particular, 
record it with the program), the sound degraded markedly.

Mike

mrichter@xxxxxxx
http://www.mrichter.com/


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