lpHmod
1st order lowpass filter with resonance and self-modulation with the highpass output to increase the slope steepness The starve parameter allows to continuously subtract an amount from the LP buffer, forcing it to zero
Inlets
frac32 cutoff frequency
frac32buffer input
Outlets
frac32buffer output
Parameters
frac32.u.map freq
frac32.u.map slope
frac32.u.map.filterq res
frac32.u.map.filterq starve
Declaration
int32_t val, hp, HP;
Init
val = 0;
Audio Rate
int32_t dif = inlet_in - val;
dif = dif > 0 ? -dif : dif;
int32_t f;
MTOF(__SSAT(param_freq + inlet_freq + ___SMMUL(dif << 1, param_slope << 4), 28),
f);
val = ___SMMLA((inlet_in - val + (___SMMUL(param_res, hp) << 5)) << 1, f, val);
outlet_out = val;
HP += ___SMMUL(val - HP, f) << 1;
hp = val - HP;
val -= ___SMMUL(val, param_starve) << 1;