How to implement the following TDF II structure in core cell?

ReaktorProjects

Hi all, i'm currently trying out different EQ designs and have gotten stuck with implementing this structure in core cell.

Any help is greatly appreciated.

Cheers

Laureano Lopez

That's a transposed direct form II digital biquad. You know it's digital because of the 1-sample delays (z^-1), as opposed to the integrators (1/s) you'd find in an analog diagram. An analog topology would need to be transformed to digital first, which would give you a different diagram. This is a digital topology, so you can implement it directly:

bolabo

This might be useful -->

https://www.native-instruments.com/forum/threads/advantages-of-zdf-methodology.446535/

Laureano Lopez

That's a transposed direct form II digital biquad. You know it's digital because of the 1-sample delays (z^-1), as opposed to the integrators (1/s) you'd find in an analog diagram. An analog topology would need to be transformed to digital first, which would give you a different diagram. This is a digital topology, so you can implement it directly:

ReaktorProjects

Thankyou so much!

errorsmith

you might be interested in the 'static filter' of the reaktor 5 library.

R5_static_filter.zip

they use biquads for the 2 pole variants, but they use direct form 1 biquads.

but beware, they are called "static" for a reason: they don't respond well to fast modulation of the parameters. The ZDF implementation (see link from bolabo) is the way to go nowadays. Thats why you don't find the 'static filter' in the current reaktor lib. but maybe they are interesting for you to study.

Paule

The missing core macros from Reaktor 5 are in the user library since February 23, 2017

https://www.native-instruments.com/de/reaktor-community/reaktor-user-library/entry/show/11019/