Open a midi track in your DAW. Set the ‘midi in’ on this midi track to your controller. Set the ‘midi out’ to ‘Butterfly Effect.’ Record-engage the midi track. Right click the Sweep/Note knob on Butterfly Effect, and then turn the knob on your controller. The Sweep/Note knob should lock to your controller’s midi knob. The midi track will need to be engaged to receive midi signal and control the Sweep/Note knob.