Normalized center frequency. f0 / sampleRate.
Quality factor. "Resonance".
Normalized feedback coefficient (a1 / a0).
Normalized feedback coefficient (a2 / a0).
Normalized feed-forward coefficient (b0 / a0).
Normalized feed-forward coefficient (b1 / a0).
Normalized feed-forward coefficient (b2 / a0).
Previous input sample x[n-1].
Previous input sample x[n-2].
Previous output sample y[n-1].
Previous output sample y[n-2].
Process a single sample.
Input sample.
Output sample.
Update coefficients from normalized center frequency and Q.
Normalized center frequency. f0 / sampleRate.
Quality factor. "Resonance".
BPF made of BiquadFilter.