That is unfortunate and what it appeared to me from reading the manual. I hadn’t used any loudness controls since I switched away from Denon and to Dirac devices. I used and liked DEQ while using Denon products until the surround boosting drove me crazy and stopped using it. Stormaudio released a very nice version of loudness functionality with their beta and i quite like it. Looking around to see if any other Dirac enabled receivers/processors have it (besides monoprice htp1) and I don’t think any do.Not while Dirac is active, no. You could run another profile with MCACC and then toggle it when you want to use THX Loudness. I don't personally see any need for a loudness feature with Dirac, but I have been considering experimenting with MCACC to try out Double Bass.