Writable discs had a thermo-sensitive chemical structure. The pressure was what created the track and pits on their surface.
A laser head in a CD reader could then "scan" that track and, depending on the elevation of each point, "read" data as zeroes and ones.Ĭommercial CDs were pressed, literally, from a master disc. Data was stored on an imperceptible spiral track on the metallic surface as a sequence of pits. Those little discs were a combination of a protective plastic layer and a thin metallic surface.
So, let's see how you can turn your modern MP3s into old-school Audio CDs, just like the older folks did back in the day How Do Audio CDs Work?ĬDs are all but obsolete today.
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