| analog recording ： ウィキペディア英語版|
Analog (or analogue) recording (Greek, ''ana'' is "according to" and ''logos'' "relationship") is a technique used for the recording of analog signals which, among many possibilities, allows analog audio and analog video for later playback.
Analog recording methods store signals as a continuous signal ''in'' or ''on'' the media. The signal may be stored as a physical texture on a phonograph record, or a fluctuation in the field strength of a magnetic recording. This is different from digital recording which digital signals are represented as discrete numbers.
The Phonograph was the first machine used to capture analog sound, and was invented by the well-known inventor Thomas Edison in 1877. Edison incorporated various elements into his Phonograph that would become staples that can be found in recording devices to this day.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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