MDE-X is Synthesizer? KORG app February 22, 2017 22:39 Follow No. MDE-X is a plug-in effect that allows you to use in your DAW. Please note that you cannot launch it as standalone. Facebook Twitter LinkedIn Google+ Comments Erock225 February 22, 2017 22:39 So DP9 wanted me to authorize it & the Korg authorization window opened. I went to the site & page to do so & it doesn't appear in the dropdown window with the the other 6 instruments in the group, therefore I couldn't authorize it. How do I authorize MDE-X? Permalink Please sign in to leave a comment.