kota1 Ya know rooms are weird concerning acoustics, the best studios I've been in have sounded really strange definitely not the dark room with perfect RT-60 dissipation, smooth reverb. One of the very frustrating parts of acoustics to me is that acoustics are probably still more art than technology and computer algorithms, it's frustrating to me because I used to work in that industry using all the tech I could think of.
Here's how to set up a room with regard to acoustics, hire a person with a lot of time and experience in small room acoustics and let him/her walk around clap and talk about the music you like while walking around for a while then do exactly what he says. it's very likely a computer program will not agree with the acousticians notes.
Look at it this way my beloved Steinway "B" grand piano is the definition of a phase problem the lid bounces the sound from the hammers hitting the strings, you get the direct sound then the bounced sound later from the lid = phase problem. But no that's how pianos sound, unless you take off the lid. Acoustics is an art not a science. Flat rooms sound awful.