chebyshev ripple db (<0.0)
qfactor (resonator) (>0.0)
frequency Alpha Low Alpha Up or

samplerate: Hz
Lower corner Hz Midi note (69=A440)
Upper corner Hz Midi note (69=A440)
more matched z-transform (better off, check frequency response)
prewarp (better on)
Signal bits (including sign): -1 bit saturation save
brutal shift, this will remove shifts up to 4 positions by changing the factor, hence reducing accuracy by maximum 4 bits but more efficient calculation