Interface BiquadCoefficients

Biquad transfer-function coefficients (Direct Form, a0 normalised to 1): H(z) = (b0 + b1 z^-1 + b2 z^-2) / (1 + a1 z^-1 + a2 z^-2)

interface BiquadCoefficients {
    a1: number;
    a2: number;
    b0: number;
    b1: number;
    b2: number;
}