std::vector<CoreBackendPort *> _system_inputs;
std::vector<CoreBackendPort *> _system_outputs;
std::vector<CoreBackendPort *> _system_midi_in;
std::vector<CoreBackendPort *> _system_midi_out;
std::vector<CoreBackendPort *> _system_inputs;
std::vector<CoreBackendPort *> _system_outputs;
std::vector<CoreBackendPort *> _system_midi_in;
std::vector<CoreBackendPort *> _system_midi_out;