When the Sony Walkman was launched, 30 years ago this week, it started a revolution in portable music. But how does it compare with its digital successors? The Magazine invited 13-year-old Scott Campbell to swap his iPod for a Walkman for a week. "It took me three days to figure out that there was another side to the tape. That was not the only naive mistake that I made; I mistook the metal/normal switch on the Walkman for a genre-specific equalizer, but later I discovered that it was in fact used to switch between two different types of cassette."