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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.
    • Essentials 

    • Other American inventions 

    • Terminology 

    • Early history 

    • Improvements at the Volta Laboratory 

    • Disc vs. cylinder as a recording medium 

    • Dominance of the disc record 

    • Turntable technology 

    • Arm systems 

    • Pickup systems 

    • Stylus 

    • Record materials 

    • Equalization 

    • In the 21st century