ADAU1702 EQ Frequency offset?

When I add an EQ setting  in the SigmaStudio, but the EQ of the curve scan by the AP is  different  from which I set in the SigmaStudio.

The EQ frequency offset.

For example,when I set an 100HZ high pass filter in the SigmaStudio, but the frequency of high pass filter is about 300HZ in the  curve scan by the AP.The Sampling rate is right.
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