[FKeyPropertyResult](API\Editor\Sequencer\FKeyPropertyResult) AddNewSound ( [FFrameNumber](API\Runtime\Core\Misc\FFrameNumber) KeyTime, class [USoundBase](API\Runtime\Engine\Sound\USoundBase) * Sound, [UMovieSceneAudioTrack](API\Runtime\MovieSceneTracks\Tracks\UMovieSceneAudioTrack) * Track, int32 RowIndex )