How to modulate filter Cutoff by keyboard input?

For example, I’d like to set Cutoff to 900Hz when I press anything below C4, 1200Hz when I press above C5, and smooth transition for all keys between.

I know I can press the “+” button besides the Cutoff knob and click “KBD”, but I’m still not sure how to make it work as what I described above.

Hi and welcome to the community.

Perhaps you can do it just by drawing a curve for Keyboard in the KEYBOARD section to change the KBD modulation.

An option you have to do something like this is to use the Combinator Remap functionality and use the Combinator as modulator for Cutoff.

In the Combinate section pick a Combinate 1,2 or 3.
Select Remap as Type.
Select the modulator you wish to remap as Source. Like KBD.
Draw a curve in the display. You can add points by clicking the line - and you can drag curves.
Set the Amount to match your needs. Also remeber to add modulation amount for the Combinator to add to Cutoff.

Hope this helps.


Ah, I see. Thank you very much. I didn’t realize Combinate has a remap mode.

That being said it’s a bit difficult to draw the curve correctly, since the curve doesn’t show the current input (for example how do I know where C4 is on the X axis?)… am I missing something or it’s just how it works?

You are welcome.

In the Keyboard display in the KEYBOARD section you can see a dot on the curve when you play a note. I Believe middle C is in the middle of the curve. Then you have 5 octaves on each side evenly placed. But check it your self.
(The dot gets updated at each key press.)

In the Combinate Remap Keyboard display it’s the same. But you don’t have the dot. You have to use your ears for fine tuning.

It’s not easy to draw curves. Perhaps it could help, if it was possible to get a larger popup display to use. But perhaps it’s too much to add for that function alone. With some patience i think you can get good results as it is.