history+of+audio

18th century music 1777-Mozart

19th century music 1877-Edison and the phonograph

20th century music by 1907 the 78 RPM record was introduced and (revolutions per minute)

by 1937 33 1/3 rpm was hip

shortly after 1947 45 was hip

shortly after 1967 8-tracks were hip

by 1977 stereo cassette tape begins to become prefered for size and recordability. and the walkman

by 87 the cd and the disc man

21st century 2007 mp3 and ipod

all information researched and twisted from wikipedia