Analogue and Digital Data

Analogue data is data represented in a physical way

example of analogue data is our voices

Computers can only represent data as a combination of 1 or 0 numbers

this is called digital data

Sampling is where hardware, such as a microphone, measures the level of sound many times per second

records this as binary digits. 

Some are non-electrical such as

clocks (an analogue clock or watch, or sundials)

(RGB) is required

in the colour of each pixel