Since beta4 the EQ10Q version 2 includes a new major feature: the peaking filter have a very accurate response at high frequencies. The following figure shows the comparation between frequency response of an analog peaking filter, a classic digital implementation and the new implementation of EQ10Q. The green curve corresponds to the ideal analog peaking filter, the red one is the classical digital implementation and the blue plot is the new response of peaking filter included in EQ10Q.
Because of the bilinear transform tipically used in digital filter design from analog specification, the response of the classical peaking (red) is distorted near the Nyquist frequency. The peaking filter of EQ10Q solves this issue with a specific filter method providing the compensated response (blue).