Logic:Assigning a MIDI message to a plug in or soft synth parameter

Logic: Assigning an externally transmitted MIDI control message to a plug in or software instrument parameter.
1. Open the plug in or software instrument.

2. Go to the top menu and go to Logic Pro/ Preferences / Automation

3. Click Learn message in the window that appears

4. Move the slider or knob on your MIDI controller than is transmitting the desired MIDI message you wish to assign.

5. Click the plug in or software instrument parameter you wish to affect. A new window titled "controller assignments" will appear.

6. Move your MIDI controller fader/knob one more time. A dialog box might appear asking if you want to "reassign" the message. Click "reassign" and close the controller assignments window.

You should now be able to control the respective parameter via the control message assignment.