LPlevyjä

LPlevyjä, commonly known as LPs or records, are analog sound storage media in the form of a flat disc. They are typically made of polyvinyl chloride (PVC) and feature a series of continuous grooves etched onto their surface. The playback of an LP is achieved by a stylus, or needle, which is guided through these grooves by a turntable. As the stylus vibrates within the groove, these vibrations are amplified and reproduced as sound.

The term "LP" stands for "long playing," a designation that distinguished them from earlier, shorter-playing shellac discs. LPs are generally 12 inches in diameter and rotate at a speed of 33⅓ revolutions per minute (rpm). This combination allows for approximately 20-25 minutes of audio playback per side, making them suitable for full albums. Smaller 7-inch records, often called singles, typically play at 45 rpm.

The creation of an LP involves a complex process. A master lacquer disc is cut with the audio signal. This master is then used to create metal stampers, which are used in hydraulic presses to stamp the music onto heated vinyl discs. The grooves on the LP contain microscopic variations that correspond to the sound waves of the original recording.

Despite the rise of digital music formats, LPs have experienced a resurgence in popularity. Many audiophiles and music enthusiasts appreciate the perceived warmth and sonic characteristics of vinyl playback, as well as the tangible experience of owning and handling physical media. Record stores and music festivals continue to feature LPs prominently.