kettaplaadide
Kettaplaadide, often referred to as vinyl records or LPs (long-playing records), are an analog sound storage medium. They consist of a flat disc, typically made of polyvinyl chloride (PVC), with a continuous groove running in a spiral from the edge to near the center. Music is embedded in this groove as a physical waveform.
To play a kettaplaad, a stylus (needle) is placed in the groove. As the record rotates on
Kettaplaadide experienced their peak popularity in the mid-20th century, becoming the primary format for music distribution.