-CONFIG_VARIABLE (std::string, mtc_port_name, "mtc-port-name", "control")
-CONFIG_VARIABLE (std::string, mmc_port_name, "mmc-port-name", "control")
-CONFIG_VARIABLE (std::string, midi_port_name, "midi-port-name", "control")
-CONFIG_VARIABLE (std::string, midi_clock_port_name, "midi-clock-port-name", "control")