Filter Tuned To Note Pitch

Just like the Tuned RingMod I posted earlier, here’s a DSP chain that maps note pitch to filter frequency.

For example:

  • C-4 = 261.63Hz
  • A-4 = 440Hz
  • A-5 = 880Hz

etc.

DSP chain: dblue-tuned-filter.xrnt

Tip: If you want to invert it, simply swap the Dest Min and Dest Max values of the Key-Tracking Device. You can also tweak the scaling this way.

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thanks!

Cool thanks!

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.

Thanks :) , this makes dense mixes much much faster to manage.

wow, thanks dBlue!

oh, you stole this from me. i was doing this on a commodore pet in 1926!

CHEERS, GONNA PLAY WITH THIS INBETWEEN STUDYING!!

(doh, capslock on)

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.

This is awesome dBlue! cheers!
Must’ve been a pain in the brain to get all those values.

A bit of white noise and you’ve got perfect ‘Being Boiled’ drums :)

This is similar to what I do in Wolpertinger, a VSTi for Linux.

http://soundcloud.com/tumbetoene/wolperblubber2-7

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”

Dude, you stole that from me, I was doing this back in 1903 with cowbells and homemade resonance chambers.

Native tuned delay lines would be real nice.

This post could also serve for ringmod tune…(sorry,I couldn’t resist)…I go out

It depend of the linearity(curve)(A perfect "simple’ curve can always be modelised via a Y=“X”),ratio,max,min,scaling

With ‘formula device’,things are easier in all cases

I go out

(Complex numbers…I have never understood!..
And 2nd degree equations…I don’t remember but was simple)

ERROR: I confused 2nd degree equations with 2 unknowns variable equations

2nd degree equations are Polynomes if I remember…Harder

25 years before

Maybe some guys who try to look as engineers will understand

You want some formula tuned devices? I fiddled out most of them and made basic presets: [Effect Presets] tuned keytracked effects formulas/doofers Ktrk 1.1

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!

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