Acoustic phase Measurements

[dcibel]

For capturing accurate timing/phase, any standard XLR mic and 2 channel audio interface should be preferred over a USB mic solution. Timing reference is easily captured just with a loopback connection on the other channel of the interface, all you need is a short patch cable. It avoids the need to set up an acoustic reference, and keeps a constant timing reference for all measurements, so phase information includes complete time of flight from speaker to mic. Easy peasy.

 

[Gmauro]

HI Jon, i'm hera again with new trouble about timming alignement. TRyingh again with procedure that you explained in past, today i've this error message, and i'm not able to complete measurments. see atteeched. Any help or idea why?

 

[dcibel]

RTA measurements don't contain any impulse / phase information.

 

[Gmauro]

RTA measurements don't contain any impulse / phase information.

Of course. But this RTA whas showed automatically, i don't know why, and i'm not able to remove it. The error message is displayed selecting the 2 correct SPL measurments of mid and tweeter with acoustic timing reference.
It seems like a mistery....

 

[dcibel]

Your screenshot shows that you have selected the RTA measurements in the alignment tool. Recommend downloading the latest REW beta, it will not allow RTA measurement selection in the alignment tool.

 

[Gmauro]

Your screenshot shows that you have selected the RTA measurements in the alignment tool. Recommend downloading the latest REW beta, it will not allow RTA measurement selection in the alignment tool.

Ops... you are in right place. Sorry.
My stupid mistake.....!