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Re: [ARSCLIST] Dolby B in software

I wrote:

> > It´s a single band compressor/expander that operates in the hiss
> > region only.

 Don Cox wrote:

> Yes, putting it more precisely, it divides the signal into two bands,
> and compresses the upper band. So the equivalent in most audio programs
> is a two-band compressor with the lower band set at zero.

Sorry, No.

There is no bandsplitting being done at all to the audio signal.

And it´s absolutely NOT a two band compressor.

You´ve got it all backwards.

>From the Dolby website:


" Dolby B-type Noise Reduction does this by using a SINGLE, SLIDING
COMPRESSION-EXPANSION BAND of frequencies. A sliding band is basically a
filter that can shift its frequency breakpoint up and down. In B-type
noise reduction, the frequency where the noise reduction action just
begins can change from about 300 Hz all the way out to 20,000 Hz."


Goran Finnberg
The Mastering Room AB

E-mail: mastering@xxxxxxxxx

Learn from the mistakes of others, you can never live long enough to
make them all yourself.    -   John Luther

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