busType Determines whether the bus array is for input or output. Declarationvar busType: AUAudioUnitBusType { get } See AlsoBus Array Methods and PropertiescountisCountChangeableownerAudioUnitsubscript(_:)setBusCount(_:)addObserver(toAllBusses:forKeyPath:options:context:)removeObserver(fromAllBusses:forKeyPath:context:)