vcf x2
Oversampled 2-pole resonant low-pass filter (biquad), filter updated at k-rate
Inlets
frac32buffer filter input, 1st part
frac32buffer filter input, 2nd part
frac32 cutoff frequency
frac32 filter resonance
Outlets
frac32buffer filter output, 1st part
frac32buffer filter output, 2nd part
Declaration
data_filter_biquad_A fd;
Init
init_filter_biquad_A(&fd);
Control Rate
int32_t freq = inlet_frequency;
freq -= 12 << 21;
MTOF(freq, freq);
uint32_t q_inv = INT_MAX - (__USAT(inlet_reso, 27) << 4);
f_filter_biquad_A(&fd, inlet_in__1st, outlet_out__1st, freq, q_inv);
f_filter_biquad_A(&fd, inlet_in__2nd, outlet_out__2nd, freq, q_inv);