An audio bus is an object which represents an audio patch chord. Audio can be sent to it. It can be sonified using USoundSourceBuses. Instances of the audio bus are created in the audio engine.
Editor Properties: (see get_editor_property/set_editor_property)
audio_bus_channels(AudioBusChannels): [Read-Write] How many channels to use for the source bus.
is_automatic(bool): [Read-Write] If the audio bus can be instantiated and destroyed automatically when sources send audio to it. If this audio bus is manually started, it will override this value to be false, meaning you will need to stop the audio bus manually.