Up to this point, music was primarily a shared experience: families huddling around furniture-sized Philcos; teens blasting tunes from automobiles or sock-hopping to transistor radios; the bar-room juke; break-dancers popping and locking to the sonic backdrop of a boom box. After the Walkman, music could be silence to all but the listener, cocooned within a personal soundscape, which spooled on analog cassette tape. The effect was shocking even to its creators. – The New Yorker