John Bowen Synth Design

Hi,
In the filter parameter, it is possible to specify a value between -127 and 127 that defines the split point where the key tracking is applied. Is the default center value (0) C4 ? And do the values correspond in the number of semitones from that default center note ?
Thanks.

I believe you are correct that 0 represents C4, but I’d have to verify this by having Nicholas check this in the code.
The steps should represent semitones, yes.