I also have a UMIK-1, and tried the REW route once, but it made everything worse. I suspect a lot of the know-how in Dirac is how to automatically get good results.

In my case, the setup is pretty simple. I have full-range floorstanders that only take a single input, and I mostly wanted to control some booming in my listening position. So there's no crossover to handle or anything fancy.

Maybe for more involved situations Dirac does a better job, but, in my case, it didn't really solve anything. Also, I see they now have this newer "bass control" thing, and it's not clear if my version had it when I last tested it (around November 2025).