With some MIDI controllers, the MIDI data output is too slow for fx parameter adjustments. The simple solution is to make a custom action that runs “Adjust last touched FX Parameter” 4 times.
I needed to do this for my Arturia controller and it should work for any other MIDI controller to make it faster for adjusting plugin parameters.
http://www.twitter.com/reaperblog
http://www.facebook.com/thereaperblog
http://www.facebook.com/groups/reaperblogcommunity
http://www.patreon.com/thereaperblog