Could there exist any "making of" footage of Rowlf playing the piano while singing? I'd love to know/see how those clips were done. His hands match the heard pianoplaying pretty well, and the singing goes fine as well. But I can't imagine a set up with a piano player sitting in, although Rowlfs playing sounds very "live", a couple of mistakes and all (I adore his version of "Für Elise")!