It is called Audyssey. The difficult part of Audyssey is that there is no room for error and to make any mistakes. You need to work at mm precision.
Systems like Dirac are more easy to use, but they have a big limitation compared to Audyssey. When you use Audyssey the right way you will not loose low, mid and high frequency details compared to most other room correction systems.
Room EQ Wizard, if you have a way to input the its test signals into your system. It’s open sourced/free, just have to buy the mic and will help you get your speakers into position.
REW is great for room measurements, but won't tell you how to move your speakers. It'll just give you data to work with, but you'll still have to use your ears and mind.
I find REW very helpful, but it's good to be realistic about its capabilities.
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