REW Beta Release Alignement tool, auto phase button issue

Plipie Plip

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Nov 27, 2019
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Preamp, Processor or Receiver
Linea Research
Main Amp
Linea Research 48M20
Additional Amp
Linea research 48M10
Version: REW 5.20 beta 60
Case: Measurement of a single cabinet consisting of 2x 12" mid driver and 2x CD compression driver on Waveguide, CD drivers about 12cm in front of woofer.
Setup: mic with calibration file, usb audio device also with calibration file, mic at 1m distance ground level measurement, loopback from Ouput > Input as reference. Calibrated with dB meter with pink noise C weighted at 103db.
File: mdat



Mid response:
34592

Hi response:
34593



SPL screen Alignment tool / aligned phase at cursor (999hz):
34594


Aligned sum Result on spectrogram:
34595


Manual alignment by best guess estimate based on summed black line and phase:
34596


Spectrogram:
34597



So maybe i am doing something completely wrong with the alignment tool, or I need to set other things in REW to be set which i do not know.
But can someone check the alignment? mdat is included
 
Your choice of frequency for phase alignment is very poor, since it sits in the middle of a very sharp dip in the mid response which of course dramatically affects the phase.

34598
 
ah! thank you, i see now.
 
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