frac32buffer filter input
frac32 pitch
frac32 filter resonance
frac32buffer filter output
frac32.u.map.filterq reso
frac32.u.map.freq pitch
biquad_state bs;
biquad_coefficients bc;
biquad_clearstate(&bs);
int32_t freq;
MTOF(param_pitch + inlet_pitch, freq);
biquad_lp_coefs(&bc, freq,
INT_MAX - (__USAT(inlet_reso + param_reso, 27) << 4));
biquad_dsp(&bs, &bc, inlet_in, outlet_out);