Definitely DSP. Room Perfect, as just mentioned with Lyngdorf, Anthem Room Correction, Dirac. To be done well, room correction often takes a lot of processing power. We're already starting to see the big tech companies (Google/Amazon) incorporate DSP into their cheap speakers. The Google Home Max has this. As time moves on, I suspect this will become the next frontier for better sound for audiophiles AND the masses. It's often said the elephant in the room IS the room. I bet/hope we will all soon have the benefit of Google's cloud servers crunching out the numbers for us and applying DSP room correction.