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Somewhat different peaking EQ filter

DSP related issues, mathematics, processing and techniques

Somewhat different peaking EQ filter

Postby martinvicanek » Thu Nov 19, 2020 9:27 pm

I had a little DSP excercise which kept me busy for two weeks or so. The objective was to create a bell-shaped filter which is more concentrated around the center frequency than the common RBJ biquad, but at the same time has a flat top. This is what I came up with.
biquad EQ.png
biquad EQ.png (18.44 KiB) Viewed 267 times

4th order EQ.png
4th order EQ.png (17.49 KiB) Viewed 267 times

The schematic includes a 5-band demo equaliser (stereo, optimized). Feel free to use, integrate into your projects and modify if you like.
EQ 4th order.fsm
(39.18 KiB) Downloaded 27 times
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Re: Somewhat different peaking EQ filter

Postby adamszabo » Fri Nov 20, 2020 12:37 pm

Very interesting, thanks!
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Re: Somewhat different peaking EQ filter

Postby Spogg » Sun Nov 22, 2020 10:12 am

Very nice as always Martin!

It must be great to be able to think of a filter shape and behaviour and then be able to make it.

Thank you so much for sharing this and all your other amazing work.
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