rem: CONTROLLER_SOURCE::parameter_type TWO_STAGE_LINEAR_ENVELOPE::get_parameter(int param) const {
add: CONTROLLER_SOURCE::parameter_t TWO_STAGE_LINEAR_ENVELOPE::get_parameter(int param) const {
context: CONTROLLER_SOURCE::parameter_type TWO_STAGE_LINEAR_ENVELOPE::get_parameter(int param) const {  switch (param) {  case 1:    return(first_stage_length_rep);  case 2:    return(second_stage_length_rep);  }  return(0.0);}