About this Experiment
Did you know that before Spotify, before iTunes, and even before CDs, people bought music on huge (30cm x 30cm!) plastic disks called records? If you knew that, we're already impressed. But there's something you may not know: you don't even need electricity to play a record!
Unlike CDs, which store data in bits (either a 1 or 0, which a computer can understand), records are what is known as "analog." This means that instead of containing digital computer language, records are etched with little bumps. When the needle of a record player runs along these bumps, the needle vibrates and creates sound waves.