What's wrong with my graph?

[Ferdinand Soedharto]

Hi, so I ran the room EQ wizard frequency sweep from 20Hz-20kHz but I am not sure why the response in the higher frequencies are greatly attenuated. I tried it with different mics and it sill shows the same result.

 

[John Mulcahy]

Can you attach an mdat file? What sample rate is the mic interface set to in the OS audio config?

 

[Ferdinand Soedharto]

mdat file.

 

[Ferdinand Soedharto]

48 kHz.

 

[John Mulcahy]

You haven't made any selection for the input device, input, output device or output in REW, so you will be getting whatever the OS defaults are. The default input might be an internal mic, which might explain the very high noise levels in the impulse response and the missing HF. Select the actual devices, inputs and outputs you want to use in the REW soundcard preferences and see if that helps.