Raymond Bisha's latest podcast introduces the world premiere recording of Joseph Rheinberger's arrangement for two pianos of Bach's Goldberg Variations. Composed by Bach in 1741, the work fell into oblivion before re-emerging as part of a movement of discovery generations later. In order to breathe new life into them, such masterpieces might undergo arrangements, transcriptions and other manipulations. In this case, Rheinberger's 1883 version adds new parts to Bach's original score.