biquad_bandpass()

MAYAFLUX_API void MayaFlux::Kinesis::Discrete::biquad_bandpass	(	double	frequency,
		double	q,
		double	sample_rate,
		std::vector< double > &	a,
		std::vector< double > &	b
	)

Second-order bandpass coefficients, constant 0 dB peak gain.

Parameters

frequency	Centre frequency in Hz, clamped to (0, sample_rate/2)
q	Quality factor; higher is narrower
sample_rate	Sampling rate in Hz
a	Denominator output, resized to 3, a[0] == 1.0
b	Numerator output, resized to 3

Definition at line 101 of file Coefficients.cpp.

{
    const auto t = terms(frequency, q, sample_rate);
    emit(a, b,
        1.0 + t.alpha, -2.0 * t.cosw0, 1.0 - t.alpha,
        t.alpha, 0.0, -t.alpha);
}

References a, b, frequency, and q.