Audyssey MultEQ XT32 ain’t perfect, esp in the DEQ portion where bass and treble will be increased when listening at lower listening level. The sound theory by Audyssey engineers is “sound” but the implementation requires further tweaks to make it work.
You can follow my tutorial on the use of a utility calld Ratbussedy here: Everything about Audyssey Calibration that you need to know - #4 by desray