problem whith t/s mesurement

[florian.ght]

hi every body, today i tryed to mesure my speaker's t/s parameters and it fail for the mesuring i followed this video

and this one

but it's not working for me i tried different way : switch L and R change mesurement channel,microphone, jack, windows setting, reboot, update REW and also drivers... but REW seams to have no acces to the microphone i checked the motherboard's microphone channel it's an stereo one
and after long research, find no solution to my problem i join some photo if necessary :
if someone can help me ... thx

 

[John Mulcahy]

Try setting the microphone to 48 kHz in the Windows audio properties (instead of 96 kHz) and check there are no other mic connectors, some PCs have separate front panel and back panel connections with separate devices to select.

 

[florian.ght]

i'd just tried and have the same result plug in front/back panel, switch from 96 to 48 to 44,1 reboot my computer... do you think that i should try whith an other soundcard ?

 

[John Mulcahy]

You could do, but it is odd not to get data from the onboard audio inputs. There is a separate microphone access button for desktop apps further down in the Settings list, make sure that is on.

 

[florian.ght]

i checked every thing and also the down's button in the setting. yesterday I was able to obtain values for 10min then suddenly nothing, it disapeared. more the values looks like wrong ( calibration too) i think i'm going to get an external sound card and try on my laptop.

 

[sunil1972]

Dear John Mulcahy. I downloaded the software REW V5.0 RC9-64 Bit and run on desktop.All programmes are working fine.But at end VOICE COIL DC RESISTANCE AND ADDED MASS not working automatically. That's why calculate parameters not working properly. Does voice coil dc resistance and added mass etc are filled up manually? or i doing something wrong?. Thanks

 

[John Mulcahy]

Yes, you have to enter the values for the added mass and the voice coil DC resistance, though the coil resistance does not need to be very precise as long as it is not too high.

 

[sunil1972]

Does any formula for Added Mass. What is added mass for 10" and 12" woofer. How it can be calculate. Thanks

 

[John Mulcahy]

The mass figure is obtained by getting an accurate measurement of the mass that was stuck to the cone to make the measurement. You can find some examples of a procedure for dual added mass measurements here, single added mass is very similar.