with 1/1 octave smoothing diffrende in compare to other measure software

[user44455555]

please see attached screenshots of other software.. they show at 1/1 octave smoothing more details. speaker and measure position and sine tone level and mic correction profil is on all measure the same.

on 1/2 it is simular

 

[John Mulcahy]

Smoothing was adjusted in V5.20 beta 27 (Oct 2019) to be closer to a power average, mainly affecting larger octave fractions. Try comparing an RTA capture using Pink Periodic Noise at various octave fractions with a sweep measurement using the corresponding smoothing octave fraction. You should find they have reasonable correspondence. I find it more difficult to explain why other software should have such variation in responses that are supposed to be smoothed to 1 octave.

 

[user44455555]

I never get enable the noise button in REW to measure with noise. I try many setings. loopback or timing reference does not enable the button. see screenshot. look always as this. How can do a noise measure ?

 

[John Mulcahy]

That feature has not been implemented yet (as the tooltip says if you hover over the button). I'll hopefully get that done later this year.

 

[user44455555]

I try in arta, it have noise and sine sweep and mls measure. i notice in bass random measure diffrence on gaps. I gues this happen because the sine sweep give better signal to noise ratio at same volume. the result look in smoothing with all measure very simular. MLS need most volume for better bass results. I think noise measure not important but you write

Try comparing an RTA capture using Pink Periodic Noise at various octave fractions with a sweep measurement using the corresponding smoothing octave fraction.

so i tell/ask that i can not do that in REW.

for the smoothing can find a formula. maybe other use this https://dsp.stackexchange.com/questions/9967/1-n-octave-smoothing/9988

 

[John Mulcahy]

I think noise measure not important but you write so i tell/ask that i can not do that in REW.

Yes, you can, play Pink Periodic Noise (full range) with the REW generator and look at the response on the RTA with these settings: