@msmcleod, thanks so much for this. I am using the Studiologic Mixface and everything seems to be working, except for the following: CREATE NEW MARKER LOOP Selection The MIXFACE has a selection for both Reaper and Studio ONE (they seem to be the same Mackie Control), and the Set Markers and Enable Loop function in each as expected. Just wondering how we could get that integrated into this control surface plugin? Thanks again! Simeon