REW measurements Problem with slow PC-laptop

[John Mulcahy]

@John Mulcahy : Do the mdat serializations contain the actual recorded stream?

No, the raw data is too large.

 

[putko]

just a note. yoi maybe noticed the deep valley near 5khz. it comes from the the distance between element and microphone. l tested it this morning (and it is not a rew inside problem because it stays in 5khz when I started measuring from 2khz)

 

[putko]

This especially for John

I made further testings with the tbone microphone/soudcard and here are the results

Firs test (multiple) is arranged so that the output goes to PC:s headphones. So tbone is used inly for input. There are three measurements 1, 2 and 4 sweeps. The bass side is ok but not correct for treble. The picture is of impulse with 4 sweeps. Something is not OK.
the other measurements are made with 10$ soundcard in USB with 10$ micropnone. All tree sweeps produce the same results.

So the problen is in TBone. I suppose it does not happen wit Dayton UMM. But for me the present situation is OK. (I just want to check different bass arrangements Closed Vented Horn TL etc)

But here in finland TBone witn calibration data is about the half price of Dayton

 

[John Mulcahy]

To use multiple sweeps the input and output must be on the same interface or share the same clock source .

 

[putko]

ok,
the first case was with the same device, tbone(in the beginning of this thread) for both input and output. so this device is not suitable for multiple sweeps. (it's still very useful and moderately priced.)