Shelving Filters

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Hello all

Does anybody now how to create low-shelf filters in SonicBirth? Since there is no element for this, and I'm knew to SonicBirth, I'm wondering how can this be implemented.

Thanks

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i haven't done this before specifically, but i would use the crossover element to split the signal into the component above the shelf and below the shelf and then you can use that to raise or lower the level of each of those as you like.

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goldenhelix wrote:i haven't done this before specifically, but i would use the crossover element to split the signal into the component above the shelf and below the shelf and then you can use that to raise or lower the level of each of those as you like.
Thanks for that :) It seems like a nice and cleaver solution.

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Keep in mind though that since the SB crossover element is a "Linkwitz-Riley 24db/octave crossover", the outputs will have a phase difference of 360°.

http://en.wikipedia.org/wiki/Linkwitz-Riley_filter
http://www.linkwitzlab.com/filters.htm#3

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Kewl wrote:Keep in mind though that since the SB crossover element is a "Linkwitz-Riley 24db/octave crossover", the outputs will have a phase difference of 360°.

http://en.wikipedia.org/wiki/Linkwitz-Riley_filter (http://en.wikipedia.org/wiki/Linkwitz-Riley_filter)
http://www.linkwitzlab.com/filters.htm#3 (http://www.linkwitzlab.com/filters.htm#3)
Yes I will do, thanks for that. Also thanks for the cool LINKWITZLAB link, very very useful info.

Cheers

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Kewl wrote:Keep in mind though that since the SB crossover element is a "Linkwitz-Riley 24db/octave crossover", the outputs will have a phase difference of 360°.

http://en.wikipedia.org/wiki/Linkwitz-Riley_filter
http://www.linkwitzlab.com/filters.htm#3
This is correct, and the crossover will not make a very good sounding shelving EQ for this reason.

A typical shelving EQ has a 6dB / oct slope.

I've tried a number of methods, but without recursive equations or a specific building block, I've found it impossible.

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Have you tried using this (see bottom of thread) to build the shelving filter?
http://www.kvraudio.com/forum/viewtopic.php?t=229979

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RogerJoensson wrote:Have you tried using this (see bottom of thread) to build the shelving filter?
http://www.kvraudio.com/forum/viewtopic.php?t=229979
I was very active in that thread, but I never did try that out... thanks for the reminder!

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