Mind Your Language | 5 September 2009
Errors stick like burrs. Forty years ago, Jimi Hendrix played ‘The Star-Spangled Banner’ at Woodstock with a good deal of distortion on his guitar, mostly engendered by feedback. Some people, I learn, refer to this inaccurately as phase distortion. Phase distortion cannot of itself be heard, the physicists tell me. Phase, again, is identified in