Yesterday I calibrated again the A8A but only multipoint - 3 points - always the same for all measurements - and not YPAO 3D - angle and height. The results were better, the distortion sound on the voices diminished and the attenuation of the SW was smaller than before.
From here, my conclusion is that YPAO 3D is completely broken and I will not use it anymore until a fw revision to fix it. YPAO is still broken, it doe not measure the Front Presence speakers if these are Atmos.
I eliminated the microphone out of the equation making a calibration with the cheaper Yamaha V6A microphone. The measurements are similar but the calibration with the V6A mic sounds muffled. But on the sub side, the curve is similar. A8A mic here.
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V6A mic.
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Previous calibration with 3D.
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I measured now with the microphone in the same three positions I use for all the measurements.
Today I tried to use REW but because I changed the laptop ASIO 4 all is giving a lot of error. After two hours of tweaking I could not make a measure. I will install Another Asio driver to see if can resolve the issues.