frac32.bipolar in
frac32.bipolar out
bool32 inside ??
frac32.s.map high
frac32.s.map low
int32_t prev;
if ((inlet_in >= param_low) && (inlet_in <= param_high)) {
outlet_out = inlet_in;
prev = inlet_in;
outlet_b = 1;
} else {
outlet_out = prev;
outlet_b = 0;
}