+ static std::vector<AudioBackend::DeviceStatus> _input_audio_device_status;
+ static std::vector<AudioBackend::DeviceStatus> _output_audio_device_status;
+ static std::vector<AudioBackend::DeviceStatus> _duplex_audio_device_status;
+ static std::vector<AudioBackend::DeviceStatus> _midi_device_status;
+ static ARDOUR::ALSADeviceInfo _input_audio_device_info;
+ static ARDOUR::ALSADeviceInfo _output_audio_device_info;
+
+ mutable std::string _input_audio_device;
+ mutable std::string _output_audio_device;