Help finding LP filter sound

https://www.native-instruments.com/de/reaktor-community/reaktor-user-library/entry/show/12583/
iOS additional with your filters and credits for you. 212 snapshots now

 

I kind of understand what you are saying here with the scaling and the other things you mention, but my reaktor and math skills are not where they need to be in order to make this on my own within a reasonable time frame. So I'm gonna have to throw in the towel on this idea. Thank you for the illustrations, and thank you for your time, everyone.

 

after opening the old ms20 filter i have tosay i can understand colB's decision, not even starting to talk about this and build a new modulation friendly filter for you instead

i hope all infos are in the pic:

 

MS-20 clone now contains the ZDF filter by Colin Brown
https://www.native-instruments.com/de/reaktor-community/reaktor-user-library/entry/show/11291/

 

one could try to start rebuilding that Pitch CR filters into different/newer ones.
but one would need to convert pitch to frequency, since the never ones often use F instead P.
on top that primary part is a feedback circuit. change it a little bit and thing will maybe act totally different.
so my conclusion is:
if you like this oldschool filter, use it oldschool or it will lose its charme.
use Vst host modulation/automation or convert your blocks modulation into CR via event smoother for example.
multiply that blocks mod signal by 140 or 70 and inject it at the red arrow.
that port is called FcM but it should be feeded with a midi pitch based scaling as far i can see (its simply added as usual).
go lofi
no ultrafast modulations.

 

Not really

There are two 'MS-20'ish filters in the pic you posted. One bit very old version made with primary components, and another more recent but still old model made in core. I was referring to the core one. The primary one is so far away from being an accurate model of an MS-20 filter that it isn't really relevant from that point of view (I'm not criticising the sound of it though).

I built the ZDF to see how it would compare to the core filter (which is also an attempt at ZDF, but not using the framework). Unfortunately the comparison is pointless because transposing the filter changes it's function dramatically in the case of an MS-20 filter due to the importance of the non-linearity in defining the sound. MS-20 filter has a built in clipping/distortion unit in the feedback path, so all those rules that apply to 'linear' processes go right out of the window.

I'm still not sure about what sound the OP was searching for as the description was minimal and no examples were ever posted.

 

oh if that primary circuit is not wanted, things get easier / less work intensive.

patchlog:
(only done for LP)
-deleted the not needed primary circuit
-added a scaling knob +/-140
-added a smoother + smooth time knob

hooked up a kodiak + clock to test shortly

looking for something like this?

 

I AM IN I AM IN!

can you please share both?!

i discovered that the character of your ms-20ish is audiblypretty close to the steiner-parker by sandy small. the last one mentioned is a multiple-in single out.
may i ask what block diagram you found of the ms-20?
(and btw wouldnt it be cool to find some translatable diagrams from all over the internet of great filters and make a new thread on that==?)

 

I had a look. Sandy's filter is an exact implementation of the block diagram for 'MS-20' filter that I was using as a reference. It's might be more accurately an ms20 than a Steiner-parker! I guess they are both sallen-key derived.. not sure.

EDIT: unfortunately, its not an 'exact' implementation after all. The ZDF usage is not completely correct, so the response it pretty tame compared with what it should be like - at least from the lop pass input. However it is from the same MS-20 model that I'm aware of.