But Not All Information is Discrete…
The physical world is analog -- sound comes from pushing air with a certain energy at a certain rate, etc
By measuring a phenomenon one derives a value (number) of the phenomenon at that moment
Sampling -- taking many measurements at uniform intervals -- gives a series of numbers, the digital form
.0 .8 .7 .0 -.8 -.9 -.2 .8 .9 .2 -.7 -1 -.4 .6 1 .4 -.5 -1 -.5 .4 …