All it says is Advanced MCACC and it’s separate from the Dirac setup -I haven’t tried it though, I had Pro in the past. I was running 7.1 on my SC95 then 7.2 - I was running 5.2.4 in the end before the 505 And I settled on 7.1.2 at the moment. I haven’t set up the second sub yet but may hold off for now as I think I want to get a 7.2.4 going at some point and set it up then. I think you’d still need the mini dsp if you wanted independent sub control and some type of 2 channel for 2 of the Atmos channels. Aside from the subs all the other channels should be detected by Dirac. I had to do some tweaking on the sub levels after Dirac was done but everything else was pretty spot on. The overall processing on the height speakers is much better on this unit so that’s why I switched it up.