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TLV320AIC3256: Filter design equations

Part Number: TLV320AIC3256

Hi,

I  am using the Biquad Filter Design Tool in the  PurePath Studio. I choosed the Equalizer(Q factor)  filter. Then I set the Fc, Gain, Q as shown in Fig.1 

Applying the equations in section 1.2 of Biquad Filters Application Note.pdf, I computed  five biquad coefficients –b0, b1, b2, a1, a2 – , but the results is different from the results given by the PPS Bi-quad tool which is listed as follows, I want to know the reason.