Gets or sets the speed source of the playback being edited.
Namespace: Playbacks.OptionsEditor.SingleSelection
ActionScript.SetProperty(Playbacks.OptionsEditor.SingleSelection.SpeedSource,[value])
http://[ip]:4430/titan/get/2/Playbacks/OptionsEditor/SingleSelection/SpeedSource
POST /titan/set/2/Playbacks/OptionsEditor/SingleSelection/SpeedSource