One designed biquad section: the numerator (b*) and denominator (a*) coefficients with
a0 carried explicitly. Every design in rbjSection normalises as it goes, so a0
is 1 and rbjCoeffs is a plain unpacking; it stays in the shape because the drawn
curve (biquadMagnitudeDb) evaluates this form, where a true null is still a null
instead of a difference that cancels to an exact zero.
One designed biquad section: the numerator (
b*) and denominator (a*) coefficients witha0carried explicitly. Every design in rbjSection normalises as it goes, soa0is 1 and rbjCoeffs is a plain unpacking; it stays in the shape because the drawn curve (biquadMagnitudeDb) evaluates this form, where a true null is still a null instead of a difference that cancels to an exact zero.