If you wish to map your own MIDI controller to the parameters in our libraries (such as Dynamics or Expression), the best way to do so is by using the built in 'Learn MIDI CC' function.
This example using BBC Symphony Orchestra but this method applies to all Spitfire libraries:
1. Open the BBC Symphony Orchestra plugin.
2. Right click on the parameter you wish to control
3. Select 'Remove MIDI CC#"
4. Right click on the parameter again.
5. Select 'Learn MIDI CC'
6. Move the MIDI controller knob/fader/button you wish to control the parameter
Learn more about this process in the video below: