Object Hierarchy

    GObject
    ├── GstObject
       ╰── GstElement
           ├── GstBaseTransform
              ╰── GstBtAudioDelay
           ╰── GstBaseSrc
               ├── GstBtFluidsynth
               ╰── GstBtSimSyn
    ├── GstBtEnvelope
    ╰── GstBtToneConversion
    GInterface
    ├── GstBtTempo
    ├── GstBtPropertyMeta
    ├── GstPreset
    ╰── GstBtChildBin