void UpdateMix ( const [TArray](API\Runtime\Core\Containers\TArray)< [FSoundControlBusMixStage](API\Plugins\AudioModulation\FSoundControlBusMixStage) > & InStages, [USoundControlBusMix](API\Plugins\AudioModulation\USoundControlBusMix) & InOutMix, bool bInUpdateObject, float InFadeTime )