How are analog signals best described?
AnswerContinuous
Analog signals vary smoothly; digital signals use discrete values.
Tech · Facts & stats
Analog facts & stats
7 fact-checked facts about analog technology: vinyl, film, clocks and signals, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
What must be developed before prints can be made from a film camera?
AnswerThe film
Chemicals turn the exposed film into a visible negative.
Going deeper
What is the standard playback speed of an LP record?
Answer33 1/3 rpm
LPs spin at 33 1/3 revolutions per minute.
What device converts an analog signal into digital data?
AnswerAn analog-to-digital converter
An ADC samples the signal and turns each sample into a number.
What is the frame width of the classic still-photo film format?
Answer35 mm
35 mm film became the most popular still format.
Expert level
Who invented the phonograph in 1877?
AnswerThomas Edison
Edison's phonograph recorded sound on tinfoil cylinders.
What speed was standard for early shellac gramophone records?
Answer78 rpm
Shellac 78s dominated before vinyl LPs and singles.
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