Subharmonicon note-to-CC?

Hi folks, before I go and create one myself I was just wondering if anyone has created a patch for converting MIDI note data into CC data for key changes on the subharmonicon?

My plan is to use a NDLR Drone to control OSC1 frequency - I think it should be possible with Range Filter and Transform - I just have to work out some sensible values around a root note… I think.