boost::shared_ptr<TransportControllable> auto_loop_controllable;
boost::shared_ptr<TransportControllable> play_selection_controllable;
boost::shared_ptr<TransportControllable> rec_controllable;
boost::shared_ptr<TransportControllable> auto_loop_controllable;
boost::shared_ptr<TransportControllable> play_selection_controllable;
boost::shared_ptr<TransportControllable> rec_controllable;