frac32buffer input with unity gain
frac32buffer input 1
frac32buffer mix out
frac32.u.map.squaregain gain1
int32_t accumr = ___SMMUL(inlet_l, param_gain1);
int32_t accuml = ___SMMUL(inlet_r, param_gain1);
outlet_out = __SSAT(((accuml + accumr) << 1), 28);