Audio
Recorded sound displaced live performance
Sometime in the middle 20th century, listening to music through a recorded form, such as sound recording or watching a music video became more common than experiencing live performance. Sometimes, live performances incorporate prerecorded sounds; for example, a DJ uses records for scratching. http://en.wikipedia.org/wiki/Sound_recording ">http://en.wikipedia.org/wiki/Sound_recordingyour Amazon recommendations - Jahsonic - early adopter products