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I am well aware that the Ableton's Corpus built-in plugin can be controlled via the midi side-chain, but I still want to control the main tune knob manually from Max because I wan't micro-tonal control and to play around with sliding.

The problem is I am confused with the curvature of the knob, it's values are 0-1 but it's display of frequency value is exponential or something, here are some examples:

How would I approach this? Scaling with exp? None of the exp values line up. Maybe Linedrive? Expr?

I even tried entering a few values into mycurvefit site and it gave me a formula

y = 13.82147 + (-12.66971 - 13.82147)/(1 + (x/367.3785)^0.02725608)^0.9983976

but the formula makes no sense in the expr object.

I am a total noob in mathematics, especially in curves and stuff, so maybe I am missing something

my curve fit.png

Hi,
I am well aware that the Ableton's Corpus built-in plugin can be controlled via the midi side-chain, but I still want to control the main tune knob manually from Max because I wan't micro-tonal control and to play around with sliding.

The problem is I am confused with the curvature of the knob, it's values are 0-1 but it's display of frequency value is exponential or something, here are some examples:

knob          freq            note


0                16.35        C-1 0cents
0.2            49.57        G0 +20cents
0.25        65.41        C1  0cents
0.3           86.31        F1 -20cents
0.3333 103.83      G#1 0cents
0.4          150.27      D2 +40cents
0.5           261.63     C3  0cents
0.6           455.52     A#3 +40cents
0.6666 659.02      E4  1cents
0.7          793.10      G4 +20cents
0.75      1046.51    C5  0cents
0.8         1380.87    F5 -20cents
0.9         2404.23    D6 +40cents
1.0         4186.00    C7 -1cents

How would I approach this? Scaling with exp? None of the exp values line up. Maybe Linedrive? Expr? 

Hi,
I am well aware that the Ableton's Corpus built-in plugin can be controlled via the midi side-chain, but I still want to control the mai

controlling-ableton's-corpus-tune-knob

Figured it out, you got to pass it through a expr that uses a ftom formula and then scale it to 0-1

Controlling Ableton's Corpus tune knob