An analogy in two lines:
Analog signals are like pictures, you need to see the colors and shapes to see the whole thing.
Digital signals are like books, as long as you can read the text, the color or the strokes of the text do not matter.
That’s why replicating an analog signal accurately is difficult, any inaccuracies in transmission and replication distorts the signal. For digital signals, as long as you can make out the text, distortions do not matter.
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