Problems with measurements on Mac

smootha

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Joined
Oct 7, 2018
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1
Hi, everybody!
I'm new to REW software, and, obviously, faced some problems with sound card calibration. My frequency graph fell down after 7 kHz!
I tried to make measures with two sound cards: Tascam US-322 and Focusrite Scarlett 2i4. So, I think, the problem lies in settings of REW.
Please, help me! Tell me what to do!
 

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John Mulcahy

REW Author
Joined
Apr 3, 2017
Messages
7,212
The soundcard calibration uses a very zoomed in scale, the graph range is only +/- 3 dB. The response you posted is -3 dB at 16.5 kHz, which is a little early but the response otherwise looks good. The measurement was made at 44.1 kHz, check that the soundcard is set to operate at 44.1 kHz in the mac's Audio Midi setup - if it is set to a different rate the OS will resample the data, which can cause earlier rolloff than operating at the rate the card is set to.
 
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