Forgot to mention earlier this reminds me a lot of the VSTi Chimera. Put a noise generator before the chain, set the filter to 4n butterworth Bandpass as narrow as possible and you have a noise-synth. I adore that sound. There’s nothing like it. Windy, ghostly and haunting sounds, especially when you start modulating and morphing things.
This is great for cleaning up the aliasing/bottom-end rumble from heavily FX’d synths. Chuck the filter on HP/8-stage Butterworth and make sure your sample/synth is tuned to the right octave. Nom nom nom cleeeeeean.
OT: What other song is it I have heard with that same chord progression in the chorus? Sounds almost exactly like the same, just with an added vocal choir that go, “Ahhhhhhh- aaaaaahh”
I think I tried polynomial approximation when I wanted to make these devices, but in the end I found I had most going already with more simple, accurate curves. The filters follow a (scaled/offset) logarithmic curve, taktik had disclosed the formula and I got it going in my presets. The others are also mostly simple, i.e. hyperbolic, linear or exponential.
The polynomials, I tried math packages, but got nowhere…I should try again one day. You might have a little error in such function, but it should work. Sampling some data from the effect first, i.e. with a script reading back the frequency, then you can make an approximation for a formula device code. This could also be feasible for other (VST) effects, where you can read back the frequency of the effect somehow. Generate data, approximate, keytracker → tuned!