Shelving EQ coefficent equation - slope factor "S" documentation currently unavailable

SigmaDSP & SigmaStudio RMGirard Mar 27, 2019 00:00 1 replies Original on forum ↗

RMGirard Question

Mar 27, 2019 00:00

I am trying to find the slope factor "S" for the high/low shelf EQ filter equations listed in the Wiki, but the only reference I could find is this outdated link:

http://www.musicdsp.org/files/Audio-EQ-Cookbook.txt

Can someone please regenerate the document that defines "S", please?

Thanks

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DaveThib Reply

Mar 28, 2019 00:00

Hello RMGirard,

We do not control the web site you quoted so we cannot recover the page. I did a quick web search and found this:

http://shepazu.github.io/Audio-EQ-Cookbook/audio-eq-cookbook.html

Also, there is a post on EngineerZone that you should read. It might come in handy.

https://ez.analog.com/dsp/sigmadsp/f/q-a/65799/eq-low--and-high-shelf-filter-coefficients-comming-back---mysterious-s-factor?ReplySortBy=CreatedDate&ReplySortOrder=Ascending

The same bad link you posted is on this thread as well. I will update it.

Dave T

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