Bidirectional knob, mapping

Hi
Can anyone come up with a simple way of mapping a filter knob (for Reloop Contour). Trouble is, the knob sends different MIDI commands for turning left and right. Gess I need to make two rules for this knob, but if someone can tell me straight away how it's done I'd be grateful.
Can anyone come up with a simple way of mapping a filter knob (for Reloop Contour). Trouble is, the knob sends different MIDI commands for turning left and right. Gess I need to make two rules for this knob, but if someone can tell me straight away how it's done I'd be grateful.
