Nearly every person and company today uses digital media to access information, entertainment, marketing or social networks.

This was not always the case.
Analogue or Digital
Analogue

In the late 1970s, one of the most exciting things you could own was a digital watch. Instead of trying to figure out the time from slowly rotating hands, you simply read the numbers off a digital display.
In analog technology, a wave is recorded or used in its original form. as in an analog tape recorder, a signal is taken straight from the microphone and laid onto tape. The wave from the microphone is an analog wave, that wave on the tape can be read, amplified and sent to a speaker to produce the sound.

In digital technology, the analog wave is sampled at some interval, and then turned into numbers that are stored in the digital device. On a CD, the sampling rate is 44,000 samples per second. So on a CD, there are 44,000 numbers stored per second of music. To hear the music, the numbers are turned into a voltage wave that approximates the original wave.

	Created by carolyn ebanks almost 9 years ago

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