See on a graph Zoom way way way in on the waveform and eventually you can see the individual samples themselves.
And that's all digital sound is it's a huge list of numbers strung together in order to get these numbers back into sound we can hear we need to use the opposite of an analog to digital converter or attic. So we'll use a DAC or digital to analog converter. I like it when names makes sense a DAC will read the string of numbers and generate an analog voltage based upon their values the DAC will smooth out. Out the choppiness of Apple's a bit to make the resulting sound a little more natural and now you've got an analog signal to send into an amplifier and drive a loudspeaker. The result is a near perfect reproduction of the originally recorded sound.
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