Maybe you missed it above:
DSP Studio > Room Correction > Polarity
With current MC : walk to computer, access menu "DSP Studio > Room Correction > Polarity, click on each individual speaker, close menus
My current setup : walk to each active speaker, flip the polarity switch
Better setup : remote switch of front and surround speakers on the controller in pairs.
Ideal setup: capability to mark preferred polarity in the tag or something, automatically select the polarity upon playback.
Another ideal setup: Match process polarity of files so that no need for polarity switching in the future.