GObject
        BtApplication
        BtSettings
            BtGConfSettings
            BtPlainfileSettings
        GstObject
            GstElement
                GstBin
                    BtMachine
                        BtProcessorMachine
                        BtSinkMachine
                        BtSourceMachine
                    BtWire
        BtPattern
        BtSequence
        BtSetup
        BtSong
        BtSongInfo
        BtSongIO
            BtSongIONative
                BtSongIONativeBZT
                BtSongIONativeXML
        BtWave
        BtWavelevel
        BtWavetable
        BtWirePattern