phonograph disc การใช้

The phonograph disc record was the primary medium used for music reproduction until late in the 20th century.
While cylinder phonographs never employed the lateral cutting process commercially, this was later to become the primary method of phonograph disc recording.
Marsh's best known recordings were duets by King Oliver and Jelly Roll Morton on the Autograph Records 78 rpm phonograph disc label.
Early 78 rpm phonograph discs had a dynamic range of up to 40 dB, soon reduced to 30 dB and worse due to wear from repeated play.
The history of stereo recording changed after the late 1957 introduction of the " Westrex stereo phonograph disc ", which used the groove format developed earlier by Blumlein.