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by POP Fan on October 29th, 2009
As much as digital is almost always the best when it comes to computers, analogue is still important. Could you imaging if speakers could only be on or off? Music would suck. And if the screen could only be black or white?
Digital is convient for within the computer and for transfering data, wheareas analogue is usually responsible for input and output. Monitors, mice, speakers, microphones are all analogue.
The reason digital data is used inside computers is even more so because of how a computer works than the other reasons people have mentioned. Computers run on logic gates which can only give output (1) or not (0) (or low output). However, if a picture could only be displayed using little pixels that are either lit or not, computer graphics would be relatively tame.
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Comments
To the unaided human eye, the world appears to be analog in nature, but when you peer very very closely, you find that it too is quantized. Light from a monitor is quantized, sound is quantized, matter is quantized, energy is quantized, etc.
In a sense, the world is digital, but the size of the quanta are so small, and the numbers of quanta are so vast that it appears to be analog.
by yeroco on October 29th, 2009
Yes, but the term analogue would but somewhat useless if we looked at things that low. Plus, the layman's digital has evolved to mean only 1 or 0 rather than quantized and not. So in a practical sense, light and sound are analogue, though vitually everything is digital if you look at it technically.
by POP Fan on October 30th, 2009