Here is the 2nd installment that explains how to set up your Audio Interface, position your measurement microphone and take the initial measurements using the Room EQ Wizard.
https://bit.ly/4jczK16Taking Initial Measurements with REW.pdfI have used a Focusrite Scarlett 2i2 USB Audio Interface with a Dayton Audio EMM-6 Calibration Microphone in this example.
Orient the Microphone horizontally at the listening position at ear height.
It should not be pointed to the Left or the Right speaker but rather straight ahead on axis.
Use a Psychoacoustic smoothing on your SPL curves.
In the next installment you will learn how to use ACOURATE to analyze the measured Impulse Response Curves, design your Target Curve and generate the FIR Filters.