boost::optional<boost::filesystem::path> _player_playlist_directory;
boost::optional<boost::filesystem::path> _player_kdm_directory;
boost::optional<AudioMapping> _audio_mapping;
boost::optional<boost::filesystem::path> _player_playlist_directory;
boost::optional<boost::filesystem::path> _player_kdm_directory;
boost::optional<AudioMapping> _audio_mapping;