“One first name turns up in the titles of each of my Three Bagatelles for two violins (Adam and Fanny, as well as Jack and Jill); I wanted to retain this little tradition in my fourth bagatelle, which is a furioso etude with and about whistling noises (ranging from harmonics to whistling which have to be executed by both violinists). When I came across the nickname of an early Telefunken radio, I had found the next title: ‘Whistling Johanna’.”

für zwei Violinen (mit Trillerpfeifen und Hundepfeife)