Mapping an Expression pedal to control plug-in parameters in Cubase

Add a MIDI Remote Controller in Cubase:

1. Open the MIDI Remote tab
2. Open MIDI Remote Manager to add a Controller (or from the main menu Studio->MIDI Remote Controller)
3. Click 'Add Surface', enter values for vendor and model, then select the associated MIDI input ports

Map the expression pedal to Wah Thing:

4. In the Control surface add a knob, or move your expression pedal to add one automatically
5. Click 'Go to Mapping Assistant'
6. Move the Wah Thing 'Manual' knob and the Mapping Assistant will learn the parameter mapping
7. Click 'Apply Mapping'