Janet Cardiff's Feedback (2004) is an interactive sound piece that plays a Jimi Hendrix rendition of The Star Spangled Banner when the visitor steps on a wah-wah pedal. Feedback is a gift in honor of Rifkin by Tom and Kitty Stoner and Audrey and Ken Weil and further expands the Hirshhorn's collection of art made with new and, or nontraditional media (:source http://64.233.183.104/search?q=cache:Hw-byGh-DOMJ:hirshhorn.si.edu/museum/press_release.asp%3FID%3D70+janet+cardiff%2Bfeedback&hl=de&gl=at&ct=clnk&cd=14&client=firefox-a)