this is NOT a resonant high pass filter...
it is a high pass filter with a "bump".
what's the difference ?
one adds "resonance", the other adds "roundness".
give it a try, you will hear what i'm talking about...
check out this frequency response comparison of my bASS_BUMp JSFX (green) and ReaEQ (red), both set to about +3 dB "resonance"...
this is a very sexy curve, indeed...
i have attached the JSFX in this post, please give it a try and tell me what you think...
thanks
edit:
here's another frequency plot showing the curves for (Fc = 55 Hz) bump values of 0, +1.5, +3, +4.5, +6 dB...
the parameters are self explanatory, really, but i will clarify here...
frequency = center of bump (+/- 5 Hz)
bump = boost amount (+/- 0.25 dBFS)
output gain = "clean" gain (no saturation or clipping) to adjust output level
64 bit float processing so there is no need to worry about input/output level or clipping.