I've been cracking open the Core Filter modules in the hope of building more useful filters for my projects.
The VCF in question is 2 pole SV x3 S.
First up is the ubiquitous Pitch cutoff input. Inside the Core module it is mixed with the PMod control, converted to a frequency with a P2F module, then mixed with the FM input into the central Core filter.
I've never really been comfortable with the Pitch (MIDI note) > filter modulation because to my mind it acts like a key followc and would prefer to do a straight FM chain of modulations. So that means I should be able to create a FM knob that sets the cutoff point from 1 Hz to 80 kHz like in the old-timey Moogs' LPF, modulate that input with LFOs and envelopes, and eliminate the whole P and PM chain all the way up to the P2F module and the mix with the F signal...
But am I really doing that? Is there somewhere I can set the range for a straight "scientific" F control? Is that even how the Reaktor Core cells respond to the incoming F messages?
I go further and further into this Core cell stuff and get very confused and disheartened. Half the Core cells aren't even labelled as to what they are