It's very similar to a traditional band equalizer. Theoretically, the phase of the signal can be aligned with the curve using the fader. However, I don't have a idea as to how the phase change would change with the green curve.

A:

Initially VST Parametric EQ seems just a PVEQ except a few parameters are missing: the most important one is the PEAK parameter.

The PEAK parameter controls the amount of change in the 50e0806aeb kamber
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