REW and Dayton IMM-6C calibration file load problem

[joeser]

Newbie problem.

I am trying to use the above microphone, but when I try to load my calibration file for the microphone it says it isn't a recognized USB microphone and won't use the sensitivity value.

The microphone seems to work fine, I just can't use the calibration file.

I tried with Windows 10, 11 and Linux, tried using ASIO4ALL in both windows versions, same issue.
I don't know if this is because this particular microphone needs to be supported by REW, or maybe because I am using a Frameworks13 laptop which is with an AMD mobile processor and REW doesn't like the AMD USB devices?

Any help/answers would be appreciated.

 

[John Mulcahy]

REW doesn't have the data required to support that mic. You can stop the message by removing the sens factor line from the cal file.

 

[joeser]

Thanks for the quick reply!
I assume it will use the calibration data then, just not the overall sensitivity, so I should use a SPL meter to set the level?

 

[John Mulcahy]

Yes, that's right.

 

[joeser]

Worked great for checking out my system to verify that Yamaha YPAO did a proper job (with just some subwoofer volume level tweaking required). Using a USB-CtoC female coupler and normal male-male USB-C cable I managed to connect the IMM-6C at listening position to my laptop for a very budget test system.

Many thanks for REW software! (I also used REW as a frequency generator along with a Rigol oscilloscope to verify the frequency response of my old cassette deck). Amazing what you can do for testing on a small budget!