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21/11/1877 Edison announces sound recorder

6:54

edison 1878 tin foil phonograph / first recording

2:52

"I Am The Edison Phonograph" Advertising Cylinder

0:34

Newly Discovered Thomas Edison 1877 Phonograph Recording FULL VERSION

Sound recording and reproduction is an electrical, mechanical, electronic, or digital inscription and re-creation of sound waves, such as spoken voice, singing, instrumental music, or sound effects. The two main classes of sound recording technology are analog recording and digital recording.