REW Beta Release REW API beta releases

[John Mulcahy]

strange what cause such strong phase jumps

Usually a room reflection causing a sharp dip, which has a corresponding phase rotation. You can ignore phase by doing an RMS average.

 

[user44455555]

Usually a room reflection causing a sharp dip, which has a corresponding phase rotation. You can ignore phase by doing an RMS average.

RMS average is not in the new arithmetric button. I find it on old place "all SPL" and RMS + phase average. What is diffrence between RMS + phase average and (A+B) / 2 in aerithmetic menu ?
the RMS + phase average work as i expect at 600 hz. it is in middle of left and right speaker. Result is same as RMS average .

 

[mmares056]

Any idea what could have happened here? I saved all 76 measurements right before REW crashed on me. Then I tried to open the file and this is the message displayed on the screen? What steps I need to take to recover these measurements? Thank you in advance for your help.

 

[John Mulcahy]

What is diffrence between RMS + phase average and (A+B) / 2 in aerithmetic menu ?

See the help for an explanation of the averages.

 

[John Mulcahy]

Any idea what could have happened here?

Looks like the file was only partially written to disk. If you look in the temp folder of the REW log files folder (location is in the Help - About dialog) there will be copies of all measurements made in the last 7 days.

 

[user44455555]

See the help for an explanation of the averages.

so it is correct that the menu "RMS+ phase average" is diffrent to "(A+B) /2" ?. so for what i want i then should only RMS + phase average

see the diffrence between them

 

[John Mulcahy]

so it is correct that the menu "RMS+ phase average" is diffrent to "(A+B) /2" ?

Yes.

 

[user44455555]

It is very good that the generator frequency can now increase in notesteps. when i do this the lower volume of the 600 hz dip see in measure, can only very slightly hear. because lower frequency is 587 then next is 622.

Because music use mostly step frequencies so it is maybe usefull to have a notestep view so only frequency of notesteps can show or there are dots add in the SPL display curve that show the note steps ? .

Unsmooth and generator without notestep i can hear from 595 hz upto 605 very reduce volume. So seem ERB smoothing also not what humans can hear. I think in this region it is 1/12. or maybe 1/10. but no measure software offer 1/10 which use graphic equalizer. such dips also let the signal position not exact locate and so make possible stereo image problems. with few cm diffrent speaker placement or hear position can shift such dips

 

[Lowclock]

Trying to open the spectrogram for a really short impulse like the attached one causes a good old divide by 0 error.

 

[John Mulcahy]

Trying to open the spectrogram for a really short impulse like the attached one causes a good old divide by 0 error.

I guess that was while trying to generate a burst decay view. Fixed for the next build.